Crosman MK-177 multi-pump pneumatic: Part 3

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

Part 1
Part 2

Crosman MK 177 multi pump pneumatic
Crosman MK-177 is a multi-pump version of FN’s SCAR.

Today, we’ll begin testing the accuracy of the Crosman MK-177 multi-pump pneumatic. Because this rifle shoots both pellets and BBs, I’ll test both, but not at the same time and not in the same way. Today’s test of lead pellets was done at 10 meters, using the iron sights provided with the rifle.

I decided to use 5 pumps per shot for the entire test. That was both easy to do and was also pretty quick. According to the velocity test we did last time, Crosman Premier lites were averaging just over 500 f.p.s. on 5 pumps.

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Crosman MK-177 multi-pump pneumatic: Part 2

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

Part 1

Crosman MK 177 multi pump pneumatic
Crosman MK-177 is a multi-pump version of FN’s SCAR.

Happy New Year! 2014 promises to be a wonderful year for airguns, and we all will have a lot to celebrate. Edith and I wish all of you a healthy and prosperous New Year.

Lots to cover today, so let’s begin. This is the day we test the velocity of the Crosman MK-177 multi-pump pneumatic.

First things first
There’s a storage compartment in the butt, but Crosman doesn’t tell you how to access it. The black rubber buttpad is just a rubber cover with a lip that goes into a channel on the buttstock. The cover comes off like a jar lid. Don’t try to pry it off with a knife or a screwdriver because you’ll mar the plastic. Instead, grab the whole buttpad sideways and roll it off the butt. It was too difficult to do with my hands at first, so I used a pair of channel-lock pliers and it rolled right off. After 3 times though, I could roll it off at will. Be careful not to crush the plastic buttstock when doing this.

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Crosman MK-177 multi-pump pneumatic: Part 1

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

Crosman MK 177 multi pump pneumatic
Crosman MK-177 is a multi-pump version of FN’s SCAR.

Here’s an air rifle I’ve been waiting to test since this year’s SHOT Show last January, and now it’s Christmas Eve and I’m just getting started. Where do the days go?

There are 3 versions of the Crosman MK-177 multi-pump pneumatic. The one I’m testing is dark earth-colored with non-optical sights. There’s also a black version with non-optical sights and a dark-earth-colored kit gun that’s packaged with a dot sight instead of the non-optical sights. All 3 variations are pneumatic versions of FN’s Special Operations Combat Assault Rifle (SCAR) in Close Quarters Combat dress.

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Crosman 2100B multi-pump air rifle: Part 4

by B.B. Pelletier

Part 1
Part 2
Part 3


Crosman’s 2100B is a full-sized multi-pump that delivers power and accuracy with a few economic concessions.

Yesterday, I told you that today’s test was coming; but because I needed to mount a scope for this test, I was prompted to also test the UTG 3/8″ dovetail-to-Weaver/Picatinny rail adapter. There was some interest in this adapter; so I’ll continue to test it with other airguns so we get a good look at the performance. Today, I want to do Part 4 on the Crosman 2100B multi-pump that I promised back in March.

I reread Part 3 of this report to see which pellet(s) did well at 10 meters. From what I see, only 7.9-grain Crosman Premiers did well in that test, so I added a couple pellets I had not tried before to today’s test.

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Oops! My Benjamin 397 has valve lock!

by B.B. Pelletier


The Benjamin 397 (left) is a powerful multi-pump. Obsolete 397 carbine at right.

Today, we have a critical report about airgun maintenance and operation. So, if we’re being critical, let’s start with the title. It’s a It’s no one’s fault — let’s all get along title. It should read, Oops! I really screwed up! And when I say “I,” that’s exactly what I mean!

About a month ago, a friend of mine — who shall remain nameless, unless he repeates what I am about to tell you — received a new Benjamin 397 multi-pump pneumatic. Hurray!

I went over all the operational and maintenance steps carefully with him — pump it no more than 10 times per shot, always store it with one pump in it, use Pellgunoil on the pump head etc. — and then turned him loose with his new rifle. Last week the rifle came back to me with the complaint that it didn’t fire pellets anymore.

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Crosman 2100B multi-pump air rifle: Part 3

by B.B. Pelletier

Part 1
Part 2


Crosman’s 2100B is a full-sized multi-pump that hopefully delivers power and accuracy with a few economic concessions.

Blog reader J was alert and noticed that I had not yet done the accuracy test of the Crosman 2100B multi-pump. I was astonished to find that he was right, so today we’re going to look at it. But before we do, I want to show you something I did at the range last week. Some of you who have been reading for a long time will remember that over a year ago I was suffering from eye problems. It turns out that my diabetes had dehydrated me so much that my eyesight was affected. And it took a long time for the situation to correct itself. I wondered if I would ever be able to shoot with open sights again.

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Crosman 2100B multi-pump air rifle: Part 2

by B.B. Pelletier

Part 1


Crosman’s 2100B is a full-sized, multi-pump that hopefully delivers power and accuracy with a few economic concessions.

Today, we’ll look at the velocity of the Crosman 2100B multi-pump, and a strange thing occurred during the test. Actually it was two strange things — one an amazing coincidence and the other just weird. Both relate to oiling the gun, and both will be informative.

First, the coincidence. As I was writing this blog (last week, because I’m in Las Vegas at the SHOT Show this week), I got a question from a reader whose 2100 wasn’t pumping air. I asked him if he had oiled the pump piston head like he was supposed to, and I directed him to the online owner’s manual that tells how to do it and to a blog I wrote years ago that tells the same thing. A couple hours later, I get a thank you message that he’s oiled the gun and it seems to be holding air.

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