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Posted: 12/23/2005 6:37:10 AM EDT
Hi guys. I have a BM 16” lightweight upper on a Cav arms lower with a RRA bolt group. I have put just over 1000rds through it with out any problems at all up to now. I shoot mostly Wolf and xm193. The upper was used when I bought it but the bolt group and lower were new. Here is my problem. The last three times I have been out the gun has jammed once every time. I am usually shooting only 40rds per outing. It jams in a very specific way, stove pipeish. The un-ejected case is caught on the neck by the bolt at the very front of the ejection port, so it is sticking straight out in a very obvious manner. Initially I just thought this was a fluke because it was so strange but three times in a row has me wondering. What is going on? I have checked the ejector spring and it is very stiff and strong, which makes sense since it is a new bolt. I doubt it is shot stroking because it always resets the hammer and the recoil indicates otherwise. What is going on? Why now?
Link Posted: 12/23/2005 8:28:21 AM EDT
Link Posted: 12/23/2005 8:35:32 AM EDT
That bolt does not have to travel very far back to cock the weapon. It just might be short-stroking. Check the gas key or look for a broken gas ring
Link Posted: 12/27/2005 12:30:27 PM EDT
Never hurts to lube the ejector according to the TM. Solved my problems with stove pipe issues.
Link Posted: 12/28/2005 5:10:13 AM EDT
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