My latest Crosman build. PICS!

[SDale]

Well... I built it, but is isn't mine...

A friend of mine asked me to reseal his Crosman 1377 and add a Crosman carbine stock for a bit more stability.  WELL.... What he WANTED me to do and what I DID are two different things.

I envisioned a nice little "Tacticool" Carbine and got to work. First thing I ordered was an AR15 style collapsible stock for a Tippman paintball gun. I wanted a MuzzleMack stock adapter, but he's out of stock, so I got a piece of aluminum rod and turned it down to accept the stock and act as the rear action tube plug. Well, since the lathe was warm I couldn't stop there. I recrowned a new 24 inch barrel then I machined a new steel piston just slightly longer than the factory plastic one. That's enough for day 1.

Day 2, I tore the gun down and opened up the valve. I found a bit of junk in the check valve. Cleaned that out, ported the valve body, tapered and smoothed the exhaust valve, and installed a lighter (ALOT Lighter) check valve spring. Back in the gun she goes.......

Bed linered the pump arm and grips using Bulldog adhesion promoter as a basecoat. When they were dry, I shot them, the RJ Machine Breech and the rear section of the stock in Krylon OD Green. Time to go to bed.........

Next day, polished the hammer and all the slots in the main tube until they were slicker than Eel Snot. Then the assembly started. Installed all the parts along with a new Crosman 2100 hammer spring........ And I ended up with this:

[SDale]

I haven't shot it over the chrony yet, but it DEFINITLY hits with authority! It'll completely dump 17 pumps. Haven't tried any more than that cause my hand was getting pretty TIRED!!!

But it DID go through BOTH walls of my storage shed from 10-12 feet away with CPH's. Which was an accident! I wasn't expecting that at all. I was expecting it to put a dent in the side wall and that's it... Boy was I WRONG!!!

I almost want to keep her for myself!!!

[powhitetrash]

those are some sweet mods.  Never seen a tactical 1377 before.  Sniper pistol comes to mind.

[SDale]

Thanks!

I made the stock Quick Detachable. I machined the reciever slightly oversized and shrink tubed the neck of the stock for a tight friction fit. She can be taken down with no tools. Makes for a nice ssmall package.  

[Brutuz]

Well done, great result

[ronbeaux]

That looks sweet!! Good job!

[shadow]

That's the best looking 1377 I've seen Sam, great work. I imagine  a Urban camo job on it too, you know me hehe. Ed

[dk1677]

Nice job!

[bhunter66]

That is a cool shooter there! Job well done.

[Jaymo]

Sweet. I'd love to see what you could do with a 2100. BTW, what spring did you use for the exhaust valve? This build is akin to what I want to do with my 1377.

[kirby999]

That looks sharp Sam. I like it. Got any numbers yet ? kirby

[bodiej]

hahaha  that's awesome!

[SDale]

Thanks guys! I ran her over the chrony a little while ago. Only 3 shots though.


All 3 shots were at 15 pumps using CPH's
1: 876
2: 865
3: 872


It's only 3 shots, but I can see a prettygood variation from shot to shot. Things are still wearing in and lubes spreading out. Some strokes were also pumped faster than others so that may contribute a little.

For the exhaust valve spring, I used one from the Home Depot project bins. Slightly thinner wire gauge. I also cut it down a little shorter than the factory spring.
Now the gun has to be cocked first otherwise all pumps are dumped out the barrel. I'm not sure what the part number or measurments are. I took the factory spring with me. I DO remember that it cost .96 cents though!