THE GREATEST GUIDE TO COLT SMG UPPER

AR6460 = law enforcement semi-car carbine with retractable stock and sixteen inch extended barrel and bayonet lugIt can be a regular FSB and no I had no troubles sighting it in. I originally built it which has a DPMS A2 upper receiver right before obtaining the 604 receiver. I'd no complications sighting it in Using the A2 upper either.OST Agents n