08-28-2017, 01:20 PM
So it looks like a .125 bolt is really designed for a 5.56 depth and the .136 is designed for the 7.62x39/220 Russian/Grendel based case. Why are they building.125 depth bolts? Since they are lighter seems like they would fail easier. I have always been a bolt gun guy and really liking the AR especially the Grendel.