This is a discussion on AR 15 "stuck" bolt assy within the M16 AR15 forums, part of the Rifle Forum category; Hello,
Built my AR and it shoots straight and I love it. Has a problem ejecting rounds while trying to chamber a new round and ...
Built my AR and it shoots straight and I love it. Has a problem ejecting rounds while trying to chamber a new round and I am getting a new extractor and spring soon but I have one major headache I was hoping you all might help me with.
If I pivot the upper from the lower to load my fixed magazine (California, ugh), after I shut and secure the upper again, it is impossible to pull the bolt back more than a 1/4". I must use the forward assist to force it back home and remove the magazine, reinstall the magazine, and then everything is just perfect !?
Anyone recommend a fix for this?
Last edited by jarheadteacher; September 16th, 2007 at 01:55 PM.
Thanks Jason and good troubleshooting idea, but, sadly, hammer cocked or uncocked, the problem occurs.
BUT, I just heard something. After pivoting the upper to recreate the problem, one must remove the magazine, pivot the upper, THEN I JUST NOTICED THE BOLT RELEASE BUTTON, ON THE LEFT SIDE OF THE LOWER, 'CLICKS' BACK INTO POSITION when you pivot the upper open. Then close the upper again and all is fine.
It seems to have somethnig to do with the bolt release button????
This must only be a problem with CA compliant AR's with the fixed mag. I have been playing with mine and holding the bolt stop engaged while opening and closing the upper and lower. I have even done this with an empty mag in place, this the bolt stop engaged when closing the upper but does not affect charging the rifle.
But I have a full auto, FA, carrier in mine, which is ramped from the rear and pushes the bolt stop down when I charge it. This might lead me to think that you probably have some form of AR-15 carrier, modified by manufacurers to prevent use in a FA gun, and to tie up the works if a semi gun goes FA. These were designed to do this, to prevent easily converting the gun to FA.
Can you place a dummy round in the mag and then chamber it? If so it sounds like it may be a carrier problem. You are allowed to use a FA carrier in a semi gun, by ATF, not sure about CA though. You would also need to change your firing pin. The flange on a semi pin is larger than on a FA pin.
That is the only thing that I can think of that would cause this to happen.
I have never seen the problem you describe after teaching numerous officers how to use the rifle, and being an armorer. Normally they can create every problem imaginable. :)