Has anyone had issues fully seating your barrel into the new power blocks? I have impact gen 1 just upgraded to the 750 power plenum and power block but the barrel notch is not fully wanting to seat.
This.I had the same issue when I upgraded a MK2. I just took a round jewelers file and increased the depth of the "slot" in the transfer port where that pin seats and all was well. Go very slowly and c heck fit often because you don't want to take too much off.