08-09-2021, 12:55 AM
Klem Wrote:army.
Never seen that before however Montana was posting recently about out of spec lowers where the retaining pin hole has been drilled too far to the rear. Instead of the pin only stopping the buffer when the upper/lower are separated it does it every cycle. The buffer should be stopped on the forward stroke by the BCG when it goes into battery and not touch the retaining pin.
When you put the gun together and finally tilt close the upper does the BCG push back the buffer slightly as it closes or does it look like the retaining pin is still holding the buffer and recoil spring in?
You know, I think you hit the nail on the head. I checked that AR against several other of my ARs and it looks like the retaining hole is too far rear/out of spec.
I ordered a new lower from Aero Precision. Maybe that will fix it.
I did send Spikes Tactical the info with pics. I will see what they say.