I just purchased 2 PTAC Tac10 stripped 308 lower receivers at Palmetto that should be in tomorrow. Who makes an upper receivers that matches the PTAC lower?
Just because something is DPMS patters or AR-10 pattern, doesn't mean they'll match up right. The pins may line up but there may or may not be a gap where the back of the upper receiver doesn't mate up with the lower that great. One reason why some manuf. only sell 308 receiver sets, to guarantee fit