Some Crosman 2100 Intel.

[mav72]

2100/ Am77's are a blast ....    You can also take the sights off and rotate the barrel shroud for a bull/clean look.

Super accurate with JSB 8.44.




Happy Shootin!
Petey.

Nice Group Pete!

I forget but since the subject was on trigger jobs, was it you that fixed and modded the sear on a 2200 last year? I was amazed at the "No Fear" approach to modding that gun...

[lillysdad621]

i thought that maybe instead of working the trigger to make it break quickly and smoothly, after the lube tune (lithium grease on contact points after polishing contact surfaces) i could drill and tap a small allen screw to the top of the trigger blade, where it has a straight face, and use the allen screw to make it stop earlier on the rest position, so it never sits fully open. that limits travel and is adjustable to put it as close to sear engagement as possible. It is a project i have been looking into finishing; then the trigger should be much better. at least theoretically.

[mav72]

i thought that maybe instead of working the trigger to make it break quickly and smoothly, after the lube tune (lithium grease on contact points after polishing contact surfaces) i could drill and tap a small allen screw to the top of the trigger blade, where it has a straight face, and use the allen screw to make it stop earlier on the rest position, so it never sits fully open. that limits travel and is adjustable to put it as close to sear engagement as possible. It is a project i have been looking into finishing; then the trigger should be much better. at least theoretically.

Sounds good... I've seen similar done to 1377 triggers... If you got the skills, go for it... 

[lillysdad621]

i have no skills... lets hope balls and ingenuity suffice...lol

[Collier]

i have no skills... lets hope balls and ingenuity suffice...lol

Sounds familiar!

[BerkshireHunter]

I just cracked my AM77 open because it seems to be leaking air when left pumped over night. Finally bought some real punches, so that was a big help. Got the valve out, and it looked good externally. I couldn't believe how small it was! I always thought it was bigger since it's more powerful than the the 1377/760 valve -but it's 2/3s the size. Upon disassembling the valve, I think I discovered part of the slow leak, the threads were very dry, slightly corroded, and it took a vice, rubber pads, and some pliers to get it apart. It wasn't too bad in the valve, but the inside Oring was pretty dry and discolored, so I think that was the problem. I oiled it up and then put silicone grease on the threads. Tomorrow I'm going to try to find some plumbers tape for stabilizing the muzzle and try to polish a few trigger/ sear contact points. From what I've read, these guns can be a little tricky to get back together.

[dukemeister]

This is a great thread. I opened mine up today, stabilized the barrel both ends with plumbers tape, lubed and polished trigger, cut a coil of trigger spring. It shoots really well and consistently now and I'm pleased with the results - not bad for a $80 rifle. I haven't mounted the included 4x20 scope, instead I mounted a CenterPoint 4x32 scope.
How important is it to screw the valve in place, and does anyone have details for the AM77/CR2100, in particular where to drill exactly. Thanks all. I'm now a "pumper"  and I like it. I made a video of the innards opened up, it may help someone:

[warwolfmk2]

This might help some I've read somewhere can't remember were that the sear contact point push's the striker back a little when you pull the trigger. Hope this helps.

[BerkshireHunter]

So I had some problems putting the AM77 back together. After much trial and error with finesse to get all the pieces back in, I was still having issues with the trigger/ sear/ cocking peace/ hammer engagement.

I would get it so that it seemed to be working when I cocked it, pumped it, and fired it. Then I'd screw down the three screws on the back of the receiver side plate, and the trigger wouldn't move. They were too tight -I loosened them up some and I could again squeeze the trigger and have a functioning gun, but the trigger is about ten pounds. It shouldn't be because I polished some contact points and greased it though. Also, when I pull the trigger after firing a shot, the trigger does not return upwards -it only returns to the unfired position again after I cock the bolt. Something seems off with the way I put it back together, I need some advice on what I did wrong, and any pictures would be great.

I was using this to help a bit.
http://anotherairgunblog.blogspot.com/2009/02/resealing-crosman-2100-part-2.html
?? Help 

[BerkshireHunter]

So I had some problems putting the AM77 back together. After much trial and error with finesse to get all the pieces back in, I was still having issues with the trigger/ sear/ cocking peace/ hammer engagement.

I would get it so that it seemed to be working when I cocked it, pumped it, and fired it. Then I'd screw down the three screws on the back of the receiver side plate, and the trigger wouldn't move. They were too tight -I loosened them up some and I could again squeeze the trigger and have a functioning gun, but the trigger is about ten pounds. It shouldn't be because I polished some contact points and greased it though. Also, when I pull the trigger after firing a shot, the trigger does not return upwards -it only returns to the unfired position again after I cock the bolt. Something seems off with the way I put it back together, I need some advice on what I did wrong, and any pictures would be great.

I was using this to help a bit.
http://anotherairgunblog.blogspot.com/2009/02/resealing-crosman-2100-part-2.html
?? Help 

Problem solved. I found another site with some pics on how to take it apart from the other side. When I took the other reciever plate off I could better see what the trigger group was doing. After some TLC, plumbers tape, grease, and valve work, the gun is perfect now.
http://www.airgunone.com/forums/showthread.php?t=4454
^another breakdown, have to log in and register to see pics

[1377x]

i was just about to ask if its apita to open one of these guns up
long ago i opened one up but that was to butcher it for a conversion project.it wasnt going back to the stock form

does anyone have any pics of the plumber tape mod?

[BerkshireHunter]

i was just about to ask if its apita to open one of these guns up
long ago i opened one up but that was to butcher it for a conversion project.it wasnt going back to the stock form

does anyone have any pics of the plumber tape mod?

I don't have any pics, but I just tightly wrapped a couple thin layers around the outside of the barrel about a centimeter from the muzzle to stabilize it in the shroud. It was actually a pretty tight fit getting the barrel back down the shroud, so I know it's pretty good and secure. Then I just crammed a couple small pieces around the transfer port because I think someone said a small bit of air might escape there.

[ignantmike]

someone should do a youtube video on this......

[DKT88]

A Crosman legacy that has lived on.

[Petey]

Best thing you can do is stabilize the barrel...polish up the trigger...put a lighter spring in it.Remove the interlock 766-017 on the parts diagram. You don't need it. it's only there so you cant' pull the trigger with the breech open. if you remove it ,  you will be able to de-cock the AG. Seal the breech end of the barrel . and call it a day. And if you have it apart .... take a pair of pliers and move the tip of the bolt forward till you can see light through the two holes in the bolt.This can also be done without dis-assembly  by using needle nose pliers and wedging it forward very carefully ..small steps. seats the pellet right where it should be.
The rest is bunk and you will never get any tremendous gains. Accuracy is king here and the 2100/Am77 can deliver.

Happy Shootin to all!
Petey.

[lillysdad621]

bunk or not, the gunsmith at cobra's owns a 2100 that will propel 10.5 gr pellets at over 800 fps... i wish mine shot like that. he has used it for raccoon control...

[Petey]

I understand ....but on this gun that type of FPS takes more effort than it's  worth...To Me.
By all means, Please Mod away .. I love to see what people come up with.

Happy shootin to ya!
Petey.

[1377x]

bunk or not, the gunsmith at cobra's owns a 2100 that will propel 10.5 gr pellets at over 800 fps... i wish mine shot like that. he has used it for raccoon control...

nice!
i want to put a m417 barrel on mine.maybe that will make it more accurate

[BGRooster1]

 I noticed on my 2100 that the probe at the end of the bolt is half the length of the probe on the 2200 bolt . Today I read Petey has found a good way to set the probe length where it should be . Now I don't have to experiment with other ways to do the same thing . Thanks Petey

One other thing is to shorten up the 2 screws for the rear sight if they are pushing down on the barrel . When I took apart one of my 21 or 2200's . I found 2 gouges on the barrel from the screws . One gouge is deep , not just a scratch .

[dukemeister]

Today I read Petey has found a good way to set the probe length where it should be . Now I don't have to experiment with other ways to do the same thing . Thanks Petey

Can you post dimensions and maybe a photo... how far should the metal stick out of the plastic?

One other thing is to shorten up the 2 screws for the rear sight if they are pushing down on the barrel . When I took apart one of my 21 or 2200's . I found 2 gouges on the barrel from the screws . One gouge is deep , not just a scratch .

Found the same thing with mine, although more scratch than gouge. I just shimmed the top of the screws with brass washers because I didn't have access to a grinder (in retrospect I could have dremeled the screws....) Anyhow, the screws did touch the inner "barrel".
I have now done the trigger sear grind mod, clipped the sear spring, bent the clothes pin trigger spring and now the pull is much shorter and lighter but it's still a brute. Anyhow, I am shooting 1/2" groups with it at 20m, it's on target (2" circle) at 30 yards, and 7/10 at 500 ml pop bottle at 60 yds. This is an impressive rifle!