I bought a DPMS 20" A3 w/removable carry handle and front sight about 3 months ago. It has about 500 rounds through it. My problem is the rear sight has to be cranked all the way to the right in order for me to hit center target.
I have tried this at 25/50/100yds all with the same results. Could the problem be with the carry handle assembly or something with the front sight. The front sight is mounted to a 4 rail gas block.
(It is deadly accurate with the rear sight dialed all the way to the right side stop).