Factory new Colt 11.5" heavy barreled upper as used by the FBI and HRT. The barrel on this upper is the same diameter as a 14.5" SCOM barrel. The barrel is 1/7 twist with M4 feedramps.Troy quad rail handguard.Maytec sight. Barrel will be marked with Colt CAGE code 13629 MP 5.56 NATO 1/7. Colt CAGE code 13629 marked above the forward assist. CAGE code will either be roll marked or dot matrix stamped. Colt bolt carrier with MPC marked bolt. Carrier marked with a C. Cash on agreed price. Face-to-face. No trades. Questions welcome text me at 727-534-8074 Thanks for looking