hey all,
a friend of mine just bought an a2 20" ar. he brought it over to do some shooting, and it will not chamber a round. it will the bcg will not fully close, now you can force it shut but then it will not open. i have a usgi dummie round, it will cycle that through without a problem. so we mic'd the dummie against the live round and the only differance was the dummie has no primer.then we lokked at all the live rounds that we tried and even thought the bcg was not closing they all had a tiny mark on the primers. i have 3 used bcg's so we tried them all and still same results. now we have taken it to a local guy who build ar's everyday and he says just to get a ream and ream out the end of the barrel so the round will set further down it the chamber. just by crudely measuring it he says that the round is sticking out about 3/32's further than it should. any ideas