CO2

Crosman 2240 conversion to air: Part 2

by Tom Gaylord, a.k.a. B.B. Pelletier

Crosman 2240 conversion to air: Part 1
R.A.I. Adjustable Adapter: Part 1
R.A.I. Adjustable Adapter: Part 2

WARNING: This conversion changes the operation of the pistol to use air at up to three times the pressure it was designed for. The parts that are installed are strong, but there are other parts in the gun that aren’t changed and could fail when subjected to the higher pressures. Pyramyd Air advises anyone making such a conversion to exercise extreme caution.

Crosman 2240 air conversion
My Crosman 2240 has been converted to operate on high-pressure air.

This report covers:

• Where we are
• Before filling the first time
• Shooting the gun
• Crosman Premier pellets
• RWS Hobby pellets
• RWS Superdome pellets
• What comes next

Let’s look at what the conversion to air did for the Crosman 2240. Boy, was there ever a lot of discussion on that report! I think this may be one of the all-time most popular subjects on this blog.

Where we are
Here’s where I am with this subject. The 2240 is now converted. I plan to test it with 2,000 psi air today, and I do not plan to go higher. This is a test of what’s out there and some of the things that can be done with a 2240, but I’m not in the business of hotrodding this pistol. Many other folks are doing that very well; so, if you are interested in what’s possible, read what they have to say.

Today, I’m going to test the pistol with the conversion but with the stock striker spring still installed. In other words, if you simply screwed the tube into the gun and did nothing else (the front sight still has to come off to clear the tube), this is what you’ll get. I did change the face seal, which is why I disassembled the pistol in the previous report; but that wasn’t strictly necessary, since I am pressurizing to only 2,000 psi. I did it just to show how the entire kit is installed.

Before filling the first time
Before filling the gun, which is now done through the male Foster nipple on the end of the air tube, I put several drops of silicone chamber oil into the fill nipple. It came to me bone-dry, and I wanted all the seals inside the unit to get a coating of this oil. Then, I connected the gun to my carbon fiber air tank and slowly filled it to 2,000 psi. I say slowly, but as small as this air tube/reservoir is, it fills pretty fast. It probably took only 15-20 seconds to fill it all the way. You want to go as slowly as as possible to keep heat from building.

When I bled the air connection in the hose, the inlet valve in the air tube remained open and all the air bled out. So, I refilled it and bled it a second time. This time, it sealed as it should — thanks to the oil, I believe.

Shooting the gun
It was now time to test the gun. I had no idea what it was going to do, but I left my hearing protection off to hear if the first shot was loud. It wasn’t. Perhaps the gun is a little louder than it is when using CO2, but the difference is not that great. Of course, I used eye protection for the chronographing session, because the pellet trap is so close. I use a trap with duct seal to keep the rebounds down and the noise to a minimum.

Crosman Premier pellets
The first pellet I tested was the 14.3-grain Crosman Premier dome. I should add that I shoot only the pellets from the cardboard box, which is why I link to them, only. We were informed several months ago that Crosman planned to stop selling Premiers in the cardboard box and I stocked up on them. But I see they’re still available.

Back in 2010, I did a test of the CO2 2240 pistol, so I have the recorded velocities for this exact pistol on CO2. It averaged 448 f.p.s. with Crosman Premiers. On 2000 psi air, the first shot was 468 f.p.s. It increased to a maximum of 492 f.p.s. by shot 7 and dropped back to 466 f.p.s. by shot 15. At the end of the string, the gun was still holding 1200 psi of air pressure. The average velocity of 15 shots was 486 f.p.s., which means air boosted the average velocity of this pellet by 39 f.p.s.

RWS Hobby pellets
Next up were 11.9-grain RWS Hobby pellets. When the pistol was running on CO2, these pellets averaged 482 f.p.s. On 2000 psi air, they started at 515 f.p.s. and increased to 537 f.p.s. by shot 9. The velocity droped back down to 511 f.p.s. by shot 16. The average velocity for this string of 16 shots was 525 f.p.s. — a 43 f.p.s. increase on air. The remaining pressure was 1200 psi, once again.

RWS Superdome pellets
The final pellet I tested was the 14.5-grain RWS Superdome. When the pistol ran on CO2, Superdomes averaged 455 f.p.s. On 2000 psi air, they started at 470 f.p.s. and drifted up to 495 f.p.s. by shot 7. They dropped back down to 467 f.p.s. by shot 16. The average velocity was 483 f.p.s., an increase of 28 f.p.s. over CO2.

Notice that the gun performs similarly, regardless of what pellet was tested. The curve starts out slow, builds to the maximum quickly and then drops back to the starting point just as quickly. The three pellets gave a total shot count of 15, 16 and 16, respectively.

What comes next?
I can’t test the pistol for accuracy as it is right now because the front sight has no clearance to be re-installed. And the plastic 2240 receiver does not have a scope base on the receiver. Decision time.

I could get a steel breech for the 2240 from Pyramyd Air. While it will not accept the 2240 rear sight, it does have 11mm dovetails for a scope. That’ll work with the barrel that’s on the gun right now; but if I get a longer barrel, I’ll get a little more velocity from this same setup. So, I ordered a 14.5-inch barrel from an eBay vendor.

There are a number of different ways this can go with these parts, so I will wait to see what seems best once I have them.

Crosman 2240 conversion to air: Part 1

by Tom Gaylord, a.k.a. B.B. Pelletier

R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 1
R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 2

This report covers:

• What this is
• Thanks to Rick Eutsler
• Step-by-step instructions
• How hard is it?

Today, I’m starting a fresh and different look at the Crosman 2240 air pistol. You may have noticed that I linked to the R.A.I. adjustable shoulder stock adapter at the beginning of the report. That’s because my plan is to convert the 2240 to operate on high-pressure air and test it again as a small PCP carbine. And, I might add, not only is it small, it’s also affordable if done in stages.

WARNING: This conversion changes the operation of the pistol to use air at up to three times the pressure it was designed for. The parts that are installed are strong, but there are other parts in the gun that aren’t changed and could fail when subjected to the higher pressures. Pyramyd Air advises anyone making such a conversion to exercise extreme caution.

What this is
What we are looking at today is a device that is so simple, yet apparently effective that many will slap their foreheads and wonder why they didn’t think of it themselves. It’s a drop-in device that changes the operation of a 2240 pistol from CO2 to air. It appears very simple, but there’s some disassembly and parts-swapping involved, so that’s what I’m going to show you today.

What’s happening is that you’re dropping a high-pressure air cartridge into the space where a CO2 cartridge would normally go. And if that was all there was to it, we would be done. Just remove the CO2 cap, remove the empty cartridge, slide the unit in and screw it tight against the face seal. But there’s the rub. The face seal in a 2240 is not designed for high-pressure air. So, we have to substitute a different face seal, and that’s where the disassembly comes in.

Thanks to Rick Eutsler
This conversion was suggested to me by Rick Eutsler, who appears with me on American Airgunner. He thinks a lot of it and wondered if I’d tried it, yet. No, I hadn’t. So he sent me a device. The device is made and sold by PowerMax-HiPAC.com. This one I am testing sells for $65, according to their website, but there are many other configurations and accessories available. I’ll focus on just this one for now, and we’ll see where it takes us.

Before starting the conversion, I removed the CO2 cartridge. Then, I removed the UTG 6-Position Mil-Spec Stock Assembly and the R.A.I. adapter that connects it to the pistol. The gun was now in its factory configuration, and the conversion could begin.

 Crosman 2240 air pistol stock removed
The R.A.I. adapter and UTG adjustable stock were removed from the 2240.

Crosman 2240 air pistol air tank
The air tank (bottom) goes into the 2240, replacing the CO2 cartridge and end cap. The tank is threaded just like the end cap. The face seal inside the gun must also be changed, so disassembly is necessary.

What follows is a step-by-step disassembly and replacement of the face seal. The work is easy, but some of the parts are small — and you have to exercise caution to keep from losing them. Note that I did my work on a dark wool blanket. The wool keeps parts from moving, and the dark color allows me to use flash photography without the dark parts appearing black. If a white background were used, that’s what would happen.

Step 1. Remove front sight
The front sight is knocked off with a wood block and rubber hammer. The sight isn’t attached by fasteners, so it comes off with a light tap.

Crosman 2240 air pistol front sight off
A wood block was placed against the rear base of the front sight and tapped with a rubber hammer to remove the sight.

Step 2. Remove barrel band
The barrel band is held by Allen screws, top and bottom. Loosen both, and the band slides off the gun.

Crosman 2240 air pistol barrel band off
Loosen the screws of the barrel band and slide it off.

Step 3. Remove rear sight
The rear sight is held by a single screw that’s one of two holding the end cap to the action. Take it off, and the end cap is almost ready to come off the gun.

Crosman 2240 air pistol rear sight off
Remove the rear sight by removing one screw.

Step 4. Remove grips (optional)
The grips come off next. This step isn’t necessary; but if you want to see all the working parts inside the grip, you can do it.

Crosman 2240 air pistol remove grips
Each grip panel is held on by a single screw. There isn’t a lot to see.

Step 5. Remove end cap
Remove the rear grip frame screw, and the end cap will come off the gun. There’s a powerful spring pushing against the cap, so contain it as you remove this screw or the end cap will go flying.

Crosman 2240 air pistol remove end cap
When the rear grip frame screw is removed, the end cap and mainspring are free. Contain the end cap or it’ll go flying.

Step 6. Remove grip frame
Now the front grip frame screw is removed, and you can separate the frame from the action tube. Be very careful in this step not to lose the tiny spring and ball detent for the safety — it rests in the left side of the grip frame.

Crosman 2240 air pistol remove grip frame
Remove the front grip frame screw and lower the frame from the action tube. Be careful not to lose the safety spring and ball detent that are in the grip frame.

Crosman 2240 air pistol safety spring and detent
The safety spring and detent ball are very small. They are not under tension when the grip frame comes off; but if you turn the frame upside-down, they’ll fall out.

Step 7. Remove receiver from tube
At this point, just a single screw holds the receiver and barrel to the action tube. That screw is located in the pellet trough and is very small (I believe it’s an .050, but it may be larger). Unscrew this screw, and the receiver and barrel can be separated from the tube.

Crosman 2240 air pistol remove action screw
Remove this screw, and the action and barrel lift off the tube.

At this point, you can remove the barrel from the action. It isn’t required; but if you do, you’ll see where the transfer port fits in the bottom of the barrel.

Crosman 2240 air pistol barrel
If you slide the barrel from the receiver, you can see the machined spot where the transfer port fits.

Step 7. Remove gas transfer port
After the barrel is off the tube, the steel transfer port will be exposed. It usually stays with the tube, but nothing holds it except the seal in the valve. This small part is how the compressed gas (or air, when we convert the pistol) moves from the valve into the barrel to push the pellet. So, it’s very important.

Crosman 2240 air pistol transfer port
The steel transfer port usually stays with the tube when the barrel’s removed. If not, don’t lose it.

The transfer port has two lengths to it — a long side and a short side. The short side fits into the seal in the valve that’s still in the tube, while the long side goes into the underside of the barrel.

Crosman 2240 air pistol transfer port detail
The short side of the transfer port goes into the tube and into the seal in the valve. The long side goes in the bottom of the barrel.

Crosman 2240 air pistol transfer port seal
The transfer port seal is shown here. You see the brass valve body under it.

Step 8. Remove striker
Next, remove the striker — or what many call the hammer. It’s held in place by a small pin that must be lifted out, then the striker will come out the rear of the tube. This pin connects the bolt to the striker and is how the gun is cocked.

Crosman 2240 air pistol striker pin
To remove the striker, first remove the striker pin. There’s an enlarged hole at the rear of the cocking slot through which the pin is lifted out.

Crosman 2240 air pistol striker out
Once the striker pin is out, the striker slides out the rear of the tube.

Step 9. Remove valve screw and valve body
Remove the screw holding the valve body in the tube. When it’s out, the valve will slide out the rear of the tube. I pressed it lightly with the barrel to start it, but some valves may take a little coaxing depending on how long they’ve been in the gun — but it isn’t difficult to remove this part.

Crosman 2240 air pistol valve screw
Remove the one valve screw.

Crosman 2240 air pistol valve body
The valve body slides out the rear of the tube.

Step 10. Exchange the face seals
Now we come to the place where the face seals are exchanged. The light-colored seal is for CO2 cartridges and is too soft for the air pressure we’ll be using. It must be pried out of the end of the valve, and the black seal that’s supplied with the air conversion kit should be installed in its place. Getting the new seal in is much like buttoning a shirt collar with small buttons. The new black seal will also work with CO2; so if you want to convert back, you can skip this teardown and just remove the air tank.

Crosman 2240 air pistol valve face seal
Here’s how the face seal looks before you pry it from the valve body.

Crosman 2240 air pistol valve 2 face seals
Here’s the factory face seal (lighter one on left) and the new seal to be installed. Notice that continual use has made a groove in the factory face seal.

How hard is it?
It took me a total of 20 minutes to disassemble the pistol, and that includes taking the pictures seen here. It isn’t hard, but there are places where caution should be exercised.

Assembly is the reverse of disassembly, and there are no special tips. Just make certain that the bolt will engage the striker pin when you assemble the action, and make sure all the seals are properly seated.

That’s it for now. Next time, I’ll put air into the pistol and chronograph the results.

Winchester MP4 CO2 rifle: Part 2

by Tom Gaylord, a.k.a. B.B. Pelletier

Part 1

Today’s report is a continuation of the guest blog from HiveSeeker. Today, he tells us about accuracy

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Winchester MP4 CO2 rifle

Winchester MP4 is a realistic and fun-to-shoot military replica pellet rifle.

This report covers:

• Shots per fill
• Heavy trigger
• Best results
• The normal grouping
• Bug Buster
• Summary
• The Dallas Field Target Club inaugural shoot
• How the blog changed my life

Shots per fill
While testing pellet accuracy, I shot at 6 bullseye targets (60 shots), swapping CO2 cartridges after each set, and did not notice any decline in performance at 10 yards. I also did a lot of enjoyable spinner silhouette shooting and started noting an increase in misses only as I approached the 80-shot mark (you go through pellets fast with this semiauto!). In conclusion, shooters can expect at least 60 accurate shots before swapping CO2 cylinders, depending on temperature.

It doesn’t matter how good the Winchester MP4 CO2 rifle looks with that bipod or red dot scope on it while you’re reconnoitering the backyard. How well does it shoot? A gun is only fun if you can hit what you’re aiming it at, and the Winchester MP4 does reasonably well in the accuracy department.

Heavy trigger
My rifle does not appear to be suffering from the reported loose barrel problem (which can ostensibly be remedied by removing the 6 screws holding the Picatinny forearm and hand-tightening the barrel). However, the trigger-pull on this rifle is a conspicuously heavy 7.6 lbs. according to my hand scale. My wife and brother-in-law, who is former military (both ends of the spectrum, and both experienced shooters), singled this out as a major complaint. This is no youth rifle. I agree that accuracy would be better without having to exert so much pressure to get a pellet off. However, after some limited travel, the trigger — heavy as it is — breaks clean and crisp.

I shot outdoors at 10 yards from a benchrest using the aforementioned Bug Buster scope and a Leapers Golden Image 30mm red dot sight. All pellets tested grouped right around 1″ — give or take a little. Results were slightly better using the BugBuster. This rifle is not a tackdriver but is certainly a solid performer as long as you keep the range at 10 yards.

Best results
The following pellets gave the smallest 10-shot groups. At least one out of three measures 7/8″:
Crosman Destroyer
Crosman Destroyer EX (the slightly different version sold only in discount stores)
Crosman Premier Hollowpoint
H&N Finale Match Pistol
Air Arms Falcon

Winchester MP4 CO2 rifle Destroyer EX
Ten Crosman Destroyer EX pellets (a slightly different version of the Destroyer pellet sold at discount stores) went into 7/8″ at 10 yards.

Winchester MP4 CO2 rifle Finale Pistol
Ten H&N Finale Match Pistol pellets made this 7/8″ group at 10 yards.

Winchester MP4 CO2 rifle Falcon
These Air Arms Falcons also grouped in 7/8″ at 10 yards.

These three pellets gave at least one 10-shot group out of three as small as one inch between centers:
Crosman Competition Wadcutter
Crosman Premier Super Match
Gamo Tomahawk

The worst pellet tested was the JSB Match Diabolo Light Weight. They gave a best group that measured 1-1/8″ between centers.

The normal grouping
Most groups were erratic and inconsistent, with more pellet scattering than clustering. Nevertheless, the largest groups I got were still a reasonable 1-1/2″ (for the Crosman Destroyer EX and Gamo Tomahawk). Since each group was 10 shots, I filled one drum of the magazine completely (8 pellets) and then put only 2 pellets in the drum on the other side of the mag.

One interesting and frustrating observation was that my final 2 shots, after flipping the magazine around, almost always opened up the group, in some cases by a full half-inch or so. At least part of the time, though, this gun is capable of significantly tighter groups than I’m reporting here.

Winchester MP4 CO2 rifle pellet scattering
On the left is the only really tight group I got — 7/8″ for the Crosman Destroyer EX. Nearly every other group looked a lot more like the Crosman Premier Hollowpoint group on the right, with hardly 2 pellets in the same hole anywhere.

Bug Buster
I mentioned that I shot this gun with a Leapers UTG 3-9×32 Bug Buster scope. When I first started sighting in at 10 yards, my initial POI was a very low 5″ under the bullseye. I had to do a lot of clicking to get the POI near the bullseye; and by the time I was finished, I noticed a fair amount of blurring in the bottom quarter of the scope’s field of view. I suspect I’m approaching the limit of adjustment on this sight. The amount of blurring worsens at higher magnifications. I own another Leapers UTG 4-16×40 scope that I just love, but field of view and eye relief on the compact Bug Buster are not nearly as forgiving or comfortable. Both my wife and brother-in-law (again, each an experienced shooter) complained about how difficult it is to sight through this scope. Although the Bug Buster has performed reliably and adds to the military look of this gun, I’m going to try a 40mm or larger compact scope on it at a later date.

Winchester MP4 CO2 rifle Bug Buster
The Leapers UTG 3-9×32 Bug Buster was much better to look at than to look through. The scope showcased the drawbacks of a small-objective compact.

A couple minor notes before wrapping up: Although Pyramyd Air rates this rifle a 4 out of 5 for loudness, I didn’t find it to be especially noisy outdoors. On my screened porch, the report was definitely loud, but that depends on how the sound is bouncing off the walls. Shooting noise from inside a bedroom was only average, which is how I would rate this gun for sound.

Also, the manual states that you should store this gun uncocked. Every time you fire, the bolt is re-engaged by CO2 pressure for the next shot. After you’ve finished shooting and have removed the CO2 clip, remember to point the rifle in a safe direction and squeeze the trigger one last time before casing it.

Summary
In conclusion, the Winchester MP4 is an authentic- looking and handling military replica with some known issues but enough accuracy to make it quite enjoyable for casual shooting. For plinking around the yard while looking like a commando, this rifle fills the bill — and does so nicely.

The Dallas Field Target Club inaugural shoot
Bob Dye submitted the following report and photos of the first Dallas Field Target Club shoot.

Twenty-six shooters appeared on a beautiful June 14 day for the event, some traveling from as far as Oklahoma and Louisiana.

Dallas FT Club meeting
The first Dallas Field Target Club match was well-attended.

Everyone had fun with friendly competition in all the usual AAFTA competition classes. Among them were 6-7 new shooters. Some chose to participate in one of the regular AAFTA classes, while four others participated in a Fun Rifle category, where basically anything goes concerning shooting style and equipment choices.

Great scoring latitude was offered, scoring one point for simply hitting the animal faceplate and two for a knockdown. This appeared to be a great way to let the novice shooters have fun scoring points plinking lead against steel, along with the extra satisfaction when the target falls over. It also served as a fun change of pace among the experienced shooters.

Dallas FT Club shooter
Shooters enjoyed the relaxed pace of the day.

While the facilities have lanes long enough to create a challenging Troyer difficulty of 36 or more, this first, 50-shot match was built on 9 lanes to a 23 Troyer, again to put some smiles on faces the first time out. [Editor's note: Brad Troyer devised a way to rate the difficulty of a field target course based on the size of the kill zones; the distances at which they're placed; and the difficulty of the shot based on placement, light and shooting position.]

Accordingly, two of the seasoned veterans rose to the challenge to ace the course. David Alsup shot a perfect 100/100 in Open PCP. And, while I told him I thought he was a shoo-in to do this, David asked to keep his score card, indicating it was a special day for him, too. Great shooting, David!

Likewise, perennial Hunter Class leader Ron Robinson also shot 100/100 with his brand new TM1000 rifle. I haven’t seen such a big grin on Ron’s face is some time. Or at least since last weekend in Pulaski. Ask him how he likes his new rig and be prepared for 5 minutes of superlatives. Excellent match with a new rifle, Ron!

Altogether, 17 of the 26 competed in one of the two Hunter Classes, including two in Hunter Piston. Four people posted scores in Open PCP — rather unusual in these parts.

The mostly sunny weather cooperated for a mid-June day, with a high of only 85 degrees F during the match, which made the humidity bearable. The turnout was superlative for this first ever club match.

Thanks to members Kevin Enzian, Jeff Latimer and Jerry Cupples for helping me set up the course the afternoon before. I couldn’t have done it by myself.

Next match is in August. Stay tuned. Visit the Dallas Field Target Club website.

How the blog changed my life
I initially published this section on the May 30, 2014, blog. I’m going to repeat it at least once a week during June and July so it doesn’t get lost or forgotten.

From the comments many of you make, I believe the blog may have positively impacted your lives. I invite you to send me an email telling me about that impact.

Were you a firearms shooter who accidentally discovered airguns through this blog? If so, tell me how this blog has helped your understanding of airguns.

Were you already an airgunner, but you thought what you saw in the big box stores was all there was? If so, how has this blog helped you understand more about airguns?

I’ve gotten quite a few responses already, but I want to make sure you know that I’m not looking for “attaboys,” pats on the back or personal recognition. I’m looking for real feedback on what you’ve learned so I can target my blogs to what you feel is important, what you’d like to know and what you’re still unsure of. This blog is written for its readers, and I want to share your stories with others who may be where you were before you found this blog.

Pyramyd Air has created a special temporary email address for this. I’ll be the only person to get these emails, and we’re not going to generate any lists from the addresses.

My plan is to publish one or more blog reports with the more interesting comments. If you want, I will use your real name or blog handle; but you can be anonymous, too. I won’t use your name or handle unless you give me written permission to do so.

This email address will be live for only a few weeks. We have tens of thousands of readers worldwide. Even if you’ve never commented on the blog, you can email me your message if you like. If you’re reading this blog after July 2014, email submissions will no longer be forwarded to me, and you may get an auto-reply email stating that or your email might bounce back to you.

Winchester MP4 CO2 rifle: Part 1

by Tom Gaylord, a.k.a. B.B. Pelletier

Today’s report is a guest blog from a new reader, HiveSeeker. He wants to tell us about a pellet rifle he thinks highly of. This is a complete report with the description, velocities and test targets, so I am breaking it into two sections.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

This report covers:

• Description
• Sights
• Loading
• Ammo feed
• Velocity

Winchester MP4 CO2 rifle

Winchester MP4 is a realistic and fun-to-shoot military replica pellet rifle.

Description
Considering the astonishing array of military rifle lookalikes in the airsoft world, it’s a shame that there are so few choices among airguns. But those who would enjoy shooting an accurate reproduction pellet rifle might consider the Winchester MP4 CO2 rifle. Styled closely after the AR15, this .177 airgun features a full-metal receiver, quad Picatinny rail forearm, working selector switch (safety), realistic magazine catch and adjustable stock — lots of authentic moving parts that are only fixed plastic on a number of the other military replicas. The forward bolt assist is only ornamental, but the charging handle (hereafter called the bolt) is fully functional. This also happens to be one of the few semiauto replica pellet rifles available. My ex-military brother-in-law experienced a fair amount of nostalgia shooting this rifle.

Winchester MP4 CO2 rifle The selector switch, magazine catch (on right side of gun) and adjustable stock are fully functional. Note the position of the fully inserted CO2 clip, which looks like the ammo magazine.

Sights
The first thing you’ll want to do after unboxing the MP4 is remove the cheap plastic open sights — among the unfriendliest I’ve ever squinted through. They’re not individually adjustable, and the manual doesn’t include one word about them. Just know that you can raise or lower the aiming point by moving the front sight closer or farther in relation to the rear sight; they apparently cannot be adjusted for windage. [Editor's note: The manual and Winchester's website state the rear sight is adjustable, so we asked the manufacturer about it. They say it's not adjustable and plan to remove that statement from their website and from future reprints of the manual.]

A red dot sight works well (and looks tacti-cool) on this gun, though I primarily used a Leapers UTG 3-9×32 Bug Buster scope, which also looks very good. The all-metal receiver provides a very solid platform for mounting optics compared to the plastic receivers of some other contenders in the military pellet rifle arena. Despite being a low-recoil CO2 gun, the bolt recocking mechanism apparently generates some vibration. As a shooter who admittedly tends to over-tighten everything, I was stunned to find my scope mounts loose after about 300 shots. Keep an eye on this.

Winchester MP4 CO2 rifle You’ll want to replace the plastic open sights right away.

Winchester MP4 red dot

Winchester MP4 scope
The MP4 looks ready for combat with either a red dot sight or compact scope. That quad Picatinny rail is just begging for more accessories!

Loading
This gun requires two 12-gram CO2 cartridges. You can spend all day trying to “remove the cover from the base of the CO2 clip by inserting a finger into the ammunition magazine hole and pulling the cover off” (as the manual suggests). There’s no hidden release, and the instructions of course mean the larger CO2 clip hole to the right (go ahead and laugh, manual-spurners).

My CO2 clip fits very tightly in the receiver; and the first time I tried to shoot this gun, it took me a couple trigger pulls to realize the clip was not seated all the way. Look closely at the photos to see how far the clip must slide in. Clip insertion and removal are slightly smoother now but initially required a fair amount of pressure.

Winchester MP4 CO2 rifle Remove the CO2 clip cover by inserting a finger into the larger hole on the right (not the smaller one on the left) and pulling up. It’s easy if you’re not following the wrong instructions! The plastic key above the clip cover is used for installing the CO2 cartridges.

Ammo feed
Exercise more care in gently inserting the ammunition magazine, however, as the thin plastic of the round rotary drums is easily cracked. A magazine holds 16 pellets or BBs, though this is a bit deceptive. There are only 8 rounds in each end, and you have to perform a magazine flip to shoot all 16 rounds. I suggest buying at least a couple extra magazines. The buttplate I found to be uncomfortably hard, but a rubber AR-15 add-on fit perfectly, as will most other AR accessories, except anything for the nonstandard pistol grip. My next add-on will be a bipod, which should fit perfectly on the forearm.

Winchester MP4 CO2 rifle Insert the ammunition magazine gently. The thin plastic of the 2 rotary drums is easily cracked.

If you’ve read any reviews of the Winchester MP4, then you already know that there’s a major ammo feed issue with this gun. Mine is no exception, but so far the problem has been occasional enough to live with — only about 1 pellet out of every 1 to 2 magazines (averaging around 5%) is failing to fire. This is despite carefully using a pellet seat; a tiny ridge inside each individual drum cavity stops the skirt, allowing consistent loading of each pellet. Other owners, however, have experienced a much worse problem, so I’m keeping my gun as is.

Velocity
Let’s look at some chronograph data. My 10-for-$10 test printout from Pyramyd Air with 7.1-grain Beeman Lasers showed a velocity range of 480-538 fps, with an average of 500 fps even. Waaay lower than the listed 700 fps (which I initially figured was just for BBs), as a number of reviewers have pointed out. For my own tests, I shot 10-shot strings at sea level, waiting one minute between shots, using a Shooting Chrony Beta Master. With 4-grain Crosman SSPs I got a range of 683-710 fps and an average of 694 fps in the better of two tests (air temperature was 88˚F).

Interestingly, the other test string averaged a lower 686 fps but contained my single-shot velocity record of 722 fps. So, the Winchester MP4’s velocity stated on the box is correct, and this gun indeed shoots just as fast as Daisy claims — and with pellets, no less. I did not test with BBs, although this gun is designed to shoot them, wishing to save my barrel (and its accuracy) for pellets only.

Testing with a more typical pellet, the 7.9-grain Crosman Premier Super Match, provided expectedly lower velocities: 487-562 fps with an average of 511 fps (at 84˚F). This was much closer to the 10-for-$10 results. Below are my average shot string velocities.

Shot string….Avg velocity
1-10…………………..511
11-20………………..496
21-30………………..483
31-40………….…….470
41-50…………….….449
51-60………………..444
61-70…………….….438
71-80………………..421

Summary
HiveSeeker continues his test with accuracy results in the next report. I’ll run that next week.

R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 2

by Tom Gaylord, a.k.a. B.B. Pelletier

Part 1

stock extended
The UTG stock is attached to the Croswman 2240 with the adapter and extended as far as it will go.

This report addresses:

• Crosman 2240 pistol is accurate!
• Sight-in reveals a tip!
• Accuracy testing
• Summary

Today, I get to shoot the Crosman 2240 air pistol as a carbine. Thanks to the adapter from R. Arms Innovations and the adjustable UTG 6-position Mil Spec AR stock, my 2240 is now a handy carbine. Allow me to explain why that’s such a good thing.

2240 is accurate!
Many years ago, when I knew much more than I do now, I wrote an article for Shotgun News about some vintage air pistols — specifically the Crosman Mark I Target pistol and the Smith & Wesson 78G. Both vintage air pistols have superb handling and light, crisp triggers, not to mention their fine adjustable sights. I was writing about how the golden age of target air pistols had ended 30 years earlier, and I included a Crosman 2240 pistol in the article, just for comparison. You know — so people could see how far things had slipped over time. Imagine my chagrin to see the 2240 turn in the best results of the test, despite having a much cruder trigger and sights that were as simple as a door latch. I wrote the article that way, admitting my surprise that the current gun bested the two golden oldies, despite lacking all of their sophistication.

Sometimes, I think of myself as the Charlie Chaplin of writers. I’m always doing things my readers know will explode in my face, and I guess it’s funny to watch — or, in this case, read. Anyhow, the Crosman 2240 rubbed my nose in it real good that time!

We now have a chance to let the 2240 sprint like the thoroughbred that it is. The peep sight that comes on the pistol could not be used when it was a pistol; but with this adjustable stock attached, it can now come into play.

One more thing I learned in today’s test. I thought I had the stock adjusted perfectly when we began. It was set up for the Benjamin Marauder pistol that has a scope mounted on it, and what I didn’t consider when switching over to the 2240 was how far my eye would be from the peep hole. Fortunately, the UTG stock adjusted one more click in, and then the peep sight was in the right place. That’s why an adjustable shoulder stock is better than a stock of fixed length when you’re trying different air pistols like I am.

Sight-in
One reason you read this blog is the occasional tip you get. Well, today’s the day! The 2240 uses a standard rear sight that has a peephole on the same plate as the notch. Simply flip the plate over (you have to take it off the sight to do this), and the peep is available. It isn’t a precision target aperture, but neither is the peep sight on a Garand, M1 Carbine or M16, for that matter.

crosman 2240 rear sight
The rear sight has both a notch and a peep hole. They adjust in both directions, but the adjustments are somewhat crude. Loosen the screw and slide the plate up and down for elevation. For windage, the entire sight slides a little side-to-side.

You adjust elevation by sliding the peephole up and down — always moving in the direction you want the shot to move. There is also some sideways adjustment by sliding the whole rear sight side-to-side, but it’s not much. On my gun, it didn’t go far enough. This is where the tip comes in!

If you can’t move the rear sight, maybe you can move the front, but on the 2240 the front sight is fixed. Ahh…but the barrel isn’t fixed! So, you move the barrel instead of the front sight. Two Allen screws on the forward barrel band (one on top, the other on the bottom) are loosened, and the barrel is pushed from side to side. But there’s a catch.

Crosman 2240  barrel band
Allen screws at the top and bottom of the barrel band are loosened, and the barrel’s pushed in the direction you want the pellet to move.

While you always move a front sight in the opposite direction you want the pellet to go, when it’s the entire barrel that’s moving, that gets reversed. Move the muzzle in the direction you want the pellet to move.

It took me 6 shots to get in the bull at 12 feet, then the sights (and the barrel band) were locked down. I moved back to 10 meters and started shooting. A confirmation shot was close to the center of the bull, so the sight-in went perfectly.

Accuracy testing
The first pellet I tried was the 14.3-grain Crosman Premier. As I was shooting the group, I could see that all the pellets were hitting inside the small bullseye. But after shot 6, the hole they were making became large enough to see from 10 meters. I know that 0.84 inches for 10 shots at 10 meters doesn’t sound very good, but it looks better when you see the hole!

Crosman 2240  Premier group
Ten Premiers went into this 0.84-inch group at 10 meters. The number is large, but the group looks good.

Next, I tried some RWS Hobbys. They usually do well in guns like the 2240; and on this day, they didn’t disappoint. The first 8 went into a group that measures 0.462 inches between centers, but then the gas pressure started to drop. I could hear it happening, but I continued shooting. Shots 9 and 10 dropped below the main group, opening it to 1.043 inches. If only I’d stopped when my gut instincts told me!

Crosman 2240 Hobby group
Eight Hobbys went into the main group that measures 0.462 inches. The final 2 pellets dropped below and opened the group to 1.043 inches.

This group made me mad because I knew that my 2240 uses CO2 pretty fast. In fact, I debated shooting the second 10-shot group because sight-in and confirmation had already used up 7 shots. I knew my gun had 25 shots on full power. I guess I just tried to scrape by, and this is what happened.

So, I changed the CO2 cartridge and started again. This time, I shot JSB Exact RS pellets, that I expected to do the best of all. And I think they did. Nine of 10 shots went into 0.497 inches, and one shot strayed to the left, opening the group to 0.698 inches. I don’t actually know which of the 10 shots is off to the left because I never called it.

Crosman 2240 JSB RS group
Nine JSB Exact RS pellets went into 0.497 inches, and that one on the left opened it to 0.698 inches. It’s still the best group of this test!

Summary
The R.A.I. adapter and UTG 6-position adjustable stock were made for the Crosman 2240. I love this little air pistol, and these accessories turn it into a handy carbine. The sights are crude; but as these groups demonstrate, you don’t need target sights to do a good job.

No, I’m not going to shoot this gun at 25 yards. Sure it can do it; and yes, the groups will all be larger. With a gun like this, 10 meters seems like a comfortable distance to me.

If you enjoy the 2240, and I know there are many who do, perhaps this adapter and stock are something you should consider. If you own several Crosman air pistols and have other family members who like to shoot, I think this adapter and stock are almost required.

Hatsan 250XT TAC-BOSS: Part 1

by Tom Gaylord, a.k.a. B.B. Pelletier

Before I start, here’s a word on the project I’m doing on how this blog has affected people’s lives. The emails are coming in, and they’re big and full! I think we’re going to get a lot out of this.

A reminder to those who don’t know what this is. I’m asking readers to email me the story of how the blog has impacted them. I’ll maintain complete anonymity for everyone unless you tell me that you want me to use your name or handle. And your email addresses only go to me — no list is being kept.

To join this project, click this link to find the special email address at the bottom of the May 30 blog report. I look forward to hearing from you.

Hatsan 250XT TAC-BOSS
Hatsan’s 250XT TAC-BOSS bears a close resemblance to the Ruger Mark III Hunter.

This report covers:

• BB caliber
• Piercing problems
• Description of the gun
• Action
• A lot of BB guns!

The airguns at this year’s SHOT Show were exciting for a number of reasons. I mention them as they come up in these reviews, and today we’ll begin looking at a BB pistol that I was very surprised to see. Hatsan’s 250XT TAC-BOSS bears a strong resemblance to a Ruger Mark III Hunter .22 pistol. Normally, lookalike airguns are copies of either military or otherwise iconic firearms. The Ruger Mark III is certainly a popular handgun, but it’s not really in either category. Yet, here’s a BB pistol that copies it so closely that it even has the quirky Ruger disassembly lever in the back of the pistol grip.

The 250, as I’ll call it for the rest of this report, is powered by a single 12-gram CO2 cartridge that’s contained in the magazine with the BBs. That mag slips into the pistol grip, just like a firearm mag. The gun is made in Taiwan and has an airsoft heritage. That seems to be the popular thing today, an airsoft manufacturer converts one of their guns from 6mm plastic BBs to 4.3mm steel BBs.

Hatsan 250XT TAC-BOSS magazine
The magazine is held in by a spring at the bottom, just like the Ruger mag. It holds both the BBs and the CO2 cartridge. The piercing screw is hidden from view in the magazine floorplate.

The magazine holds 17 BBs in a stack. To load the gun, you pull down on the magazine follower and drop the BBs in through the top portal one at a time.

BB caliber
And, by the way — I know that nearly all airgun makers refer to steel BBs as 4.5mm and .177 caliber these days, but they’re not! BBs measure 0.171-0.173-inches in diameter, which works out to just over 4.3mm. This is important when owners try to do things that won’t work because their guns are mislabeled. That’s why I always refer to steel BBs as either BB caliber or I tell you the nominal measurements.

Piercing problems
This airgun doesn’t have blowback but I wanted to make sure, so I installed a CO2 cartridge. Naturally, I used a drop of Crosman Pellgunoil on the tip. When the cartridge is pierced, the gas usually stops flowing instantly. It didn’t this time. A soft hiss went on for 15 seconds as I tightened the cartridge more and more, using the large Allen screw in the magazine base. That’s very unusual, so I exhausted the gas and tried a second cartridge from a different manufacturer, also with Pellgunoil on the tip. Since I had to release all the gas in the first cartridge, the magazine was allowed to sit for 10 minutes to return to room temperature before the second trial.

The second time, the gun sealed immediately, just as it should. Since I used a different cartridge for this test, I conducted a third test using the first brand of cartridge, just to see if it was a cartridge problem. It wasn’t. The third cartridge also sealed immediately. This is a lesson in how important it is to always use a drop of Pellgunoil on the tip of each cartridge, because this pistol really needed it!

Incidentally, I really like how the piercing screw is hidden in the base of the magazine. I know BB pistol shooters make a big deal over being able to see the piercing mechanism, and on this gun you can’t.

The gun
The gun is finished entirely black. The grip frame and grips are plastic, as well as both sights. The remainder of the parts are metal, including the fluted barrel jacket. The barrel is 6.75 inches long and smoothbored. The shape of the triggerguard doesn’t match the Ruger Mark II triggerguard. This one is scalloped for the finger(s) of a second hand. That’s probably an improvement because two-handed pistol shooting is very popular today.

The gun weighs 29 oz., and the grip is very comfortable. Both sights are fixed, and the front sight has a green fiberoptic tube. That probably makes sense on a BB gun as it is a point-type airgun. You don’t need precision for a BB pistol.

Hatsan 250XT TAC-BOSS front sight
The front sight has a green fiberoptic tube. The rear has none.

The bolt doesn’t move, though the Ruger-like flanges at the rear will make you at least give it a try. I think a blowback version of this pistol would be so cool because that bolt would come back just like the bolt on a firearm.

Hatsan 250XT TAC-BOSS safety
The safety is on the left side of the frame and can be operated by the thumb of a right-handed shooter. The rear sight is fixed. The bolt tabs look like they might move, but they don’t.

The safety is in the same place as the safety on the Ruger firearm, and it works the same way. It’s easy to apply, and a right-handed shooter can both apply it and take it off with their thumb. Once applied, it blocks the trigger.

Action
This pistol is double-action only. That said, the trigger-pull is light and smooth. There’s no stacking (sharp increase in the pull effort) near the end of the trigger travel. There’s a pause at the end of the travel, however, and a skilled handgunner will be able to pull to this point, then squeeze off the shot.

A lot of BB guns!
Before anyone mentions it, I have been testing a lot of BB guns this year. And there are a lot more to come. This seems to be the year of the BB pistol, and Edith and I have selected the ones most people are talking about; or in the case of today’s pistol, the ones they should be talking about.

Legends Makarov Ultra: Part 3

by Tom Gaylord, a.k.a. B.B. Pelletier

Part 1
Part 2

Umarex Legends Makarov Ultra BB pistol
Umarex Legends Makarov Ultra is very realistic!

This report covers:

• Loading
• Winchester Target Cube
• Rested position
• Accuracy
• Overall evaluation

Today is accuracy day for the Legends Makarov Ultra BB pistol and the big question is: How does it hold up against its non-recoiling brother that we all know is very accurate? I think you’re going to be pleased with the results.

Load up
I installed a fresh CO2 cartridge, which — thanks to yesterday’s report on CO2 – reminded me to put a drop of Crosman Pellgunoil on the tip of the cartridge before piercing. As before, the piercing was nearly instantaneous with no loss of gas. I looked at the face seal with a jeweler’s loupe and saw that it’s a thick (relatively) clear synthetic that looks like it will do its job for a long time to come.

Next, I loaded some BBs into the front of the magazine. Here’s a tip for this. Lock down the mag follower at the bottom of its slot and elevate the bottom of the mag. This way, the BBs will easily fall into the enlarged hole in the front of the magazine. If one overshoots the mark, it remains in a trough and can be rolled back to the hole very easily.

Umarex Legends Makarov Ultra BB pistol loading magazine
Elevate the bottom of the Makarov magazine, and the BBs will roll right in.

Winchester Target Cube
Once again, the Winchester Airgun Target Cube was pressed into service for a target holder and backstop. I taped the targets to the cube that now has thick cardboard on both sides. No more styrofoam comes out because of the cardboard; and the targets tear better, even when the BBs are shot at lower velocities.

The Target Cube keeps the BBs from bouncing back. That keeps the shooting area cleaner; and since I shoot BBs in my bedroom, that’s a good thing. If you shoot a lot of BBs in the house, I recommend the Target Cube.

Rested position
I then sat on a chair at 5 meters from the target and put a large pillow on my lap. When doubled over, the pillow allowed me to rest my arms so I could achieve a very steady 2-hand hold. It’s the gun we want to test — not the shooter.

The sights on the Makarov are very fine, but also sharp. I had no problem getting the same sight picture, shot after shot.

First group
The first target I shot was a 50-foot smallbore bull. Those are just slightly larger than 10-meter air rifle bulls. I had no idea where the pistol was shooting, nor how accurate it might be; but at 16 feet, I felt this target was large enough to keep all the shots on paper. I used a 6 o’clock hold, like I always do with handgun sights like these.

The shots landed about 3/4-inch below the point of aim. While the first 3 shots seemed to scatter, the next 7 stayed inside them, resulting in a fine-looking 10-shot group. In measures 0.916 inches between centers and looks even better. The bulk of the shots landed inside a half inch!

Umarex Legends Makarov Ultra BB pistol target 1
Ten BBs in 0.916 inches, with 7 of them well under a half inch! The 3 shots on the right were the first 3 shots. This gun can shoot!

Second group
The second target looks even better.  I called that shot that went to the left because of the very hard trigger pull we’ve already discussed. Actually, the trigger isn’t that hard for a double-action pull (which it isn’t), but for target shooting it’s way more than you want. This time, 10 shots went into 1.189 inches, with 9 of them in 0.727 inches.

Umarex Legends Makarov Ultra BB pistol target 2
Ten BBs in 1.189 inches, with 9 in 0.727 inches. That shot on the left is a called pull.

I was really impressed with the way this pistol wants to lay them in the same hole at 5 meters. That trigger pull, though, takes discipline to overcome. The tendency is to try to overpower it, which will result in shots thrown wide to the left in my case.

Third group
I decided to try a larger aim point for the third group, so I substituted a 10-meter pistol target instead. The bull is twice the size of the others, and I wondered what it might do. Oddly, it pulled my shots closer together, though I did get a very vertical shot string. This time, 10 shots went into 1.334 inches, with 9 in 0.683 inches. Look at this group, and you’ll see the pedigree of the non-recoiling Makarov showing through.

Umarex Legends Makarov Ultra BB pistol target 3
Ten BBs in 1.189 inches, with 9 in 0.727 inches.

Results
Yes, I think this Makarov is just as accurate as its non-recoiling brother. What separates them is the stiffer trigger on this one. It makes you really hold tight, and any distraction will cause you to throw a shot.

Overall evaluation
I like the Makarov Ultra BB pistol. In fact, I think I’m going to buy this one for my growing collection. This is what inexpensive BB pistols should be.

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