Brownells 75th Anniversary - A Shooting Heritage

Genuine Colt Quality - Ready for Your Next AR-15 Pistol / SBR Build

This genuine Colt 11.5" Heavy Profile Barrel epitomizes modern warfare’s need for speed and mobility - AND it’s ready to install on your next AR-15 pistol or SBR.  The barrels is forged from ordnance-grade carbon steel, with a chrome-lined bore and chamber, plus a traditional matte black Parkerized finish.

The Colt 11.5" Heavy Profile Barrel comes with the barrel extension, M4-type (round) front handguard cap, and front sight tower/gas block ALL installed. The gas port is drilled for a carbine-length gas tube - giving you an extra measure of reliability in a pistol build.

  • 1-7" rifling twist
  • 1/2"-28 tpi muzzle threads
  • Front sight tower/gas block has bayonet lug
  • Front sight post IS included
  • Carbine-length gas tube not included
  • OAL of entire assembly: 12-1/8"
  • All NFA rules apply

Built with compatibility in mind, Colt’s 11.5" Heavy Profile Barrel fits any standard "mil-spec" AR-15 / M16 / M4 upper receiver, and it’s chambered for 5.56x45mm NATO, so it will also safely fire civilian .223 Remington ammo as well.


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Cartridge: 5.56 mm NATO

Length: 11.5"

Contour: Government

Finish: Black

Gas System Length: Carbine

Muzzle Threads: 1/2-28, ...

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