Colt FBI HRT 11.5″ Heavy Upper


Availability: 3 in stock


Factory Colt 11.5″ heavy barreled upper as used by the FBI HRT and other federal LE agencies.  The barrel on this upper is the same diameter as a 14.5″ SOCOM barrel.   The barrel is 1/7 twist with M4 feedramps.  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.  Square or keyhole forge code.

Colt bolt carrier with MPC marked bolt. Carrier marked with a C.

Double lined Colt M4 handguards. Matech rear sight.  Matech may or may not have the gold Picatinny logo.

These do not have a permanently installed flash hider and can only be installed on a NFA registered short-barreled rifle or machinegun.  They can also be installed on a pistol.

Shown are pictures of a representative example of markings you will receive. No choice of markings.

Update 2/27/24: Placed one more into inventory.