Colt FBI HRT 11.5″ Heavy Upper


Availability: 1 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.

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 3/5/23:  Placed two more into inventory.