Well back out to the range.BCG slams shut like a bear trap,goes to battery and bang.Now.....strips round from mag but no bang.I feel as though I don't have enough reciprcating mass with OEM buffer [spring stiffer-buffer to light].Misses resetting trigger by a scouch [look on the tape it's there].Ordered an Armalite H3 buffer from riflegear for $37.00.Armalite tube being longer has extra adjustment,which I like.To be continued......