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Posted: 2/26/2006 9:27:26 AM EDT
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I just assembled an A2 rifle length and ran into a small issue. My first mag went in and fired fine except I noticed it failed to lock open. The second mag fed the first correctly then never fed again. At first I thought the round failed to fire. My immediate thought was the buffer and spring so I swapped a good lower and tried it again. No deal. So then I decided to go back to my orig. lower with a different bolt/carrier and it worked flawlessly. I then proceeded to put the bolt/carrier into a working rifle and got the same feed issue. So, that being said, is my problem lying with the bolt itself or the carrier? I'd rather not buy both again. Although I should call the supplier of the bolt/carrier and see what they'll do but my guess is that I'll get the same junk. Thanks again |
Yes, loose gas key screws will cause short stroking. Tighten the screws down to 40 inch pounds, stake them, and you should be fine. |
That is your problem. Proper repair is 2 new screws, torque to spec and stake. |
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Just to add, The Tm calls for the key screws to be tightened to 35 in lbs, Armalite tightens there’s to 37 in lbs. AR-wrench pretty much hit the problem dead on, and that is the old screws themselves may be in question, and if not heat treated correctly, the will just continue to stretch after being re-torque'd again. Best bet is to get the supplier on the phone and have them send you two replacement key screws to reinstall the key. The last thing you want is false hope by re-tightening the old screws, and find that if they do stretch more, they may snap off in the carrier leaving yourself a "fun time had by all" digging out the remnants of the screws from the carrier. 
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