1.) Colt LE6945 CK. 10.3" MK18 barrel, Monolithic railed upper, flip up sight gasblock, FA BCG.
Genuine factory colt ipper. Comes in the Colt box, with everything it did new iincluding the factory Matech flip up sight. I put it on a pistol lower and ran 60 flawless rounds through it. I hate to...