Kurosaki
I would call SAI, get a RTA# and send it back to them, they even pay the ups charge. They well repair, test fire and return it to you at no charge. Also, check your bolt #, some of the older models have a recall. My 1981 build that I just purchased, needed the bolt. SAI had it back to me in about three weeks, new forged bolt and perfect headspace for 7.62 and .308.