[chuck41]

I have Bushmaster XM15 E2S M4 bought new about six mounths ago.
It has a nice 4 1/2 lb trigger pull, my problem is after about 20 or 30
rounds the trigger pin comes out about 1/8 inch and when that happens
the trigger is out of line. Anyone know how to fix this problem?
MANY THANKS............CHUCK41

 

[GunHugger]

First make sure the trigger spring is installed correctly.

Or this will fix it.

http://www.midwayusa.com/product/528425/kns-hammer-and-trigger-pin-2nd-generation-2nd-modification-non-rotating-ar-15-small-pin-154-stainless-steel

 

[Helix_FR]

The capture spring inside the hammer is missing or broken. best way to fix is replace the hammer.