Originally Posted by
Jwknutson17
By the looks of it, the mams with KAC can won't help ya out on that one. The indexing pin on the mams needs to clear the hand guard completely. I had 7 thousands between the back of the pin and the hand guard and the locking collor on the QDC barely touched the hand guard. Only when the barrel flexed barley. So you need to have the entire pin exposed outside the hand guard by at least .03. depending how much your locking collor tightens down. I'll post up some pics when back at the main computer.