Like new Colt AR6921 M4A3 flat-top upper with Colt 14.5 M4 barrel. This is not one of the new Diemaco of Canada uppers Colt has started using on their new production LEO M4 CAR-15s and AR6900DC M4 upper conversions. This is a Colt factory produced upper with the correct C AF markings. It is also stamped M4 and has the feed ramp cuts. The Colt M4 14.5inch military barrel is marked CMP and has the bayonet lug and flash hider. A Phantom flash hider has been installed to make the barrel a legal 16inch length. This unit also comes with the fat M4 handguards, side tactical sling mount, and the carry handle. Sorry no bolt or charging handle. Pictures and references available to a serious buyer. The price is $865.00 plus shipping. Please contact me via e-mail, thanks.