SigAir ProForce MCX Virtus AEG airsoft gun: Part 4

by Tom Gaylord
Writing as B.B. Pelletier

Virtus AGE right
SigAir ProForce MCX Virtus AEG right side.

Part 1
Part 2
Part 3

This report covers:

  • A discovery!
  • The test
  • ASG 0.25-gram Open Blasters
  • TSD Bio 180 0.26-gram BBs
  • TSD 0.28-gram Tactical BBs
  • ASG 0.30gram Blaster Devil BBs
  • Full-auto
  • Summary

Today I’m shooting the Sig ProForce MCX Virtus AEG  with heavier BBs than Sig recommends. You will be able to compare today’s groups with those from Part 3 to see which BB you think is best.

A discovery!

Before we begin I need to tell you about a discovery I made. In the last report the 0.20-gram BBs that Sig supplied with the gun were not feeding well from the magazine, nor were 0.25-gram Stealth BBs. In today’s first test I had the identical problem and discovered that it isn’t the BB; it’s the magazine. It does not like feeding the last four BBs when it’s in the semiautomatic mode. So, for all of today’s test I filled the mag with way more than the 10 shots I needed and after the target was finished I went full-auto outdoors in a safe direction with the BBs that remained. All four of the BBs I tested today fed perfectly that way. read more

SigAir ProForce MCX Virtus AEG airsoft gun: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Virtus AGE right
SigAir ProForce MCX Virtus AEG right side.

Part 1
Part 2

This report covers:

  • Accuracy
  • Romeo5 XDR red dot sight
  • Sig BBs|
  • 0.20-gram TSD Tactical White BBs
  • 0.20-gram TSD Tactical Black BBs|
  • 0.20-gram Marui Black BBs
  • 0.25-gram Stealth BBs
  • Rock and Roll
  • Discussion
  • Summary

I said in Part 2 that there was a lot to test with this SigAir ProForce MCX Virtus AEG airsoft guns, and today I discovered I was understating the case. You’ll see why as we progress.


This is the beginning of the accuracy test and it’s good to remind ourselves what this airsoft gun is meant for. It’s meant for skirmishing, which means shooting people, not targets. However, the best way to get it on target and properly adjusted is still the old-fashioned way of shooting at paper.


The However today is all the variables. I will be shooting many different BBs, adjusting the Hop Up and adjusting the Romeo5 dot sight — each of which makes the equation more complex. I did not think about that until I was well into the test. read more

SigAir ProForce MCX Virtus AEG airsoft gun: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Virtus AGE right
SigAir ProForce MCX Virtus AEG right side.

Part 1

This report covers:

  • My strategy
  • Sig BBs
  • Weight
  • Getting the gun ready to fire
  • Loading the magazine
  • Use the speedloader
  • The follower needs more BBs
  • Velocity 0.20-gram Sig BBs
  • Sound and feel of the shot
  • Rock and Roll
  • More about the speedloader
  • 0.25-gram BBs
  • Full auto accuracy
  • 0.30-gram BBs
  • Trigger pull
  • Summary

Today I start reporting on the velocity of the new SigAir ProForce MCX Virtus AEG airsoft gun. I say “start” because I can’t get the full report in a single day. You will recall that Sig enclosed a 110 mainspring for me to try, as well as the 120 that’s in the gun as it comes. The 110 spring is lighter, so two things should happen. The velocity should drop a little and the rounds per minute (RPM) should increase, because the electric motor is turning the gears against less force.

My strategy

I could either replace the spring and do the second velocity test next or I could go on to the accuracy test with this spring and then do the spring swap and test everything again. I think I will do the latter for a couple reasons. It’s easier, and I am into easier. And, even if I were to do anything wrong while making the spring swap, we will at least get one complete test. read more

Air Venturi Dust Devil Mk2 Frangible BB: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Dust Devil
Dust Devil Mk2.

Part 1
Part 2

This report covers:

  • The first and best test
  • Test strategy
  • Crush test
  • Test 2 — close impact
  • What have we learned?
  • Hard target test
  • What does this tell us?
  • One last test
  • Summary

Today we look at the frangible properties of the new Dust Devil Mark 2 BBs. Remember — these are the only Dust Devils you can buy and the box does not say Mark 2. But the BB I am testing is what you can buy and all that you can buy!

The first and best test

What I show you today is the first time I have tested Dust Devils at all. I did shoot the Mark 1 Dust Devils against a concrete floor with nothing remaining and no bounce-back, and at the 2018 NRA Show where Pyramyd Air always runs the airgun range, Dust Devils were the only BBs fired and there was not one bounce-back in perhaps 10,000 shots. Today I will take it several steps further. read more

SigAir ProForce MCX Virtus AEG airsoft gun: Part 1

by Tom Gaylord
Writing as B.B. Pelletier

Virtus AGE right
SigAir ProForce MCX Virtus AEG right side.

This report covers:

  • Spring piston
  • Battery basics
  • Avalon gearbox
  • Replacement M110 spring
  • This gun
  • Sights
  • Magazine
  • Velocity
  • Hop Up?
  • At what price?
  • Discussion
  • Summary

I did a search in the blog archives and could not find another report I had written about automatic electric airsoft guns (AEG). I have done some large articles about AEG in the past for Shotgun News and for my own newsletter. I even wrote two articles for Pyramyd Air about the basics of batteries for airsoft guns — one in 2008 and the other in 2009. Those articles are still good today — 10 and 11 years later.

Spring piston

An AEG is a spring-piston gun whose piston is retracted (cocked) and loosed by a mechanical gearbox that’s powered by a small high-torque electric motor. To power the motor a battery is contained somewhere inside the gun. There is a great animation of how an AEG works on Wiki. read more

What does the new year hold?

by Tom Gaylord
Writing as B.B. Pelletier

This report covers:

  • What the new year holds
  • Big bores
  • High-tech projectiles
  • Price point PCPs (PPP)
  • Basic features of a PPP
  • Things that are good to have
  • Kiss of death for a PPP
  • Horsepower wars over?
  • Optics
  • Electronics in scopes
  • Scope mounts
  • Air compressors
  • Replica airguns
  • A dual-power spring-piston breakbarrel
  • M16 replica
  • M1 Garand replica
  • Summary
  • read more

    Springfield Armory M1 Carbine BB gun: Part 2

    by Tom Gaylord
    Writing as B.B. Pelletier

    M1 Carbine
    Springfield Armory M1 Carbine BB gun.

    Part 1

    This report covers:

    • Maxed out
    • The test
    • Charging
    • OOPs!
    • Problem number 2
    • How to get the empty cartridge out
    • Cartridge out
    • Will the second cartridge seal?
    • Oh, boy!
    • Daisy BBs
    • Air Venturi Dust Devils
    • Hornady Black Diamond
    • Smart Shot
    • Shot count
    • Feed
    • Trigger pull
    • Summary

    There is lots of interest in this BB gun lookalike! Several of you have owned Carbines in the past, or own them now, and reader Bob M is following this report and also reporting on his conversion of an airsoft Carbine from semiauto to full auto. While full auto is interesting to many, I don’t think the Carbine is the right gun for it. The firearm had a not-so-bright history with Rock-N-Roll.The M2 Carbine that is select-fire is known to wear out more rapidly in the full auto mode. More rapidly than what, you ask? Than the standard semiautomatic Carbine.

    Maxed out

    The Carbine is a weapon that is stressed to the limits of the technology that was available when they were produced in the early 1940s. It’s funny — shooters today think the Carbine cartridge is weak, and its ballistics seem to support that opinion. But the cartridge is rated to 40,000 psi (CUP, for you reloaders) which is well beyond the pressure generated by the .357 Magnum cartridge.

    Wearout happens first to the replaceable parts — particularly the extractor. The barrel goes next, getting too large just ahead of the chamber and also in the bore. Finally cracks can develop in the frame, and when that happens the rifle can no longer be salvaged, though its removable parts may be used again if they are still serviceable.

    Of course we are looking at the M1 Carbine BB gun that has none of these issues. However, I don’t think making it full auto is something I will ever do. But I’m also an old fogey. You can do as you please.

    Today we are looking at the power potential of this CO2-powered BB gun. The magazine holds up to 15 rounds and also contains the CO2 cartridge and the firing valve. So, in reality, the magazine is an essential part of the gun’s powerplant.

    The test

    I will be testing a couple different premium steel BBs, and I don’t expect to see much variation in their performance. I will also test lead BBs and frangible BBs, just so we know the whole story. Let’s go!


    The first step is to install a CO2 cartridge. The piercing cap is screwed in with the Allen wrench provided with the Carbine. That presses the CO2 cartridge against the piercing pin.


    And that’s when it happened. My best-laid plans gang aft agley. When I tightened the piercing cap the gas hissed out very rapidly and never did seal. There are three primary possibilities when this happens. Either a seal is broken, or it is not properly seated (like an o-ring in its groove) or there is a piece of dirt on the seal that’s letting the gas escape.

    Stuff like this happens to me all the time. Years ago I would just write a different blog and quietly fix the problem without telling you readers, but then I figured you must be going though the same things. It might be nice to see what I do with a problem like this so you have something to fall back on.

    Here is what I did. Since this gun is brand new I reckoned the seals weren’t broken. There was probably either some dirt on the seals or they weren’t seated correctly yet. I would remove the empty cartridge and install a fresh one with some automatic transmission fluid (ATF) sealant on it. The new cartridge might blow the dirt out of the way and the ATF sealant might lubricate the seals, making them slippery so this could happen easier. If the seal wasn’t seated, another shot of CO2 might blow it into position.

    Problem number 2

    And that’s when problem number two reared its ugly head. The now-empty cartridge wasn’t coming out! It was stuck in the magazine and no amount of persuasion would budge it. A problem on top of another problem!

    How to get the empty cartridge out

    There are a couple ways to get the empty cartridge out. The quickest is to use a rare earth magnet of sufficient power to pull the cartridge out. Or you could drill a hole on the end of the cartridge and screw in a wood screw that will grab the cartridge right away. But I did something else.

    I mixed up some JB Kwik, the 6-minute version of JB Weld, an epoxy that’s used for repairs. I cleaned the exposed end of the empty cartridge with acetone, then dropped the JB Kwik on the end and stuck the end of a machine screw to the blob of glue.

    M1 Carbine stuck cartridge
    I positioned the head of a machine screw in the blob of JB Kwik epoxy that was on the end of the CO2 cartridge, and held it there for a few minutes.

    Cartridge out

    Once the epoxy set up I let it cure for about 4 hours, as I pondered how to hold the screw for cartridge extraction. I decided to put the shank of the screw in a vise and tap the top of the magazine with a rubber hammer. As I pondered this after the 4 hours were up I grabbed hold of the machine screw to see if it was glued tightly and, lo and behold, the entire cartridge came out of the magazine easily! Of course it did!

    When I played with the screw to see if it would hold I pulled the empty CO2 cartridge out easily.

    I think the cartridge knew that I knew how to remove it and just gave up. Inanimate objects will do that when they know they’re beaten!

    Will the second cartridge seal?

    Now that the magazine was clear it was time to put in the second cartridge. For the first CO2 cartridge I had used a Sig CO2 cartridge, so I tried an ASG UltraAir cartridge next. I did that because CO2 cartridges come in different dimensions and lengths. If one is too tight, another one may not be.

    Before putting this cartridge into the magazine I dropped in many drops (20?) of ATF sealant. Then the cartridge went in and suddenly everything was together again. This one hissed for a second then grew instantly quiet, telling me it had sealed. That is the sound of a seal being blown into place. The test to see if the cartridge is pierced well is to pull the trigger, so I did.

    Oh, boy!

    I had forgotten entirely that this M1 Carbine has blowback. When I pulled the trigger there was quite a surprising reminder, in the way of recoil. This little airgun has some kick. Put that in the plus column! Now we can get on to the tests that are planned for this day!

    Daisy BBs

    First up are Daisy Premium Grade BBs. Ten averaged 413 f.p.s., but the spread was pretty large — from 386 to 435 f.p.s. That’s 49 f.p.s. The 386 was the only shot that was below 400 f.p.s., so it was an anomaly. At the average velocity this BB develops 1.93 foot-pounds at the muzzle.

    Air Venturi Dust Devils read more