11-26-2016, 06:27 AM
Very true. I've only used the Anderson 80% lowers and I do the machining on a Bridgeport milling machine. If there is any problem (which there isn't) I only have myself to blame. I've done four of them and haven't had any problems. As far as the grip screw Anderson only threads 3/4" into the lower. Before I assemble one of their receivers I run a 1/4 X 28 tap thru the receiver and there is no problems with it.

