Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage


  • 18” Fluted Heavy Barrel
  • Machined from 416R Stainless Steel
  • 1-8 twist
  • Chambered in 5.56x45mm
  • Matte black finish
  • .936” at the gas block (gas block not included)
  • Mid-Length Gas System
  • M4 feedramps
  • ½-28 threaded muzzle


  • 18” Fluted Heavy profile provides a rigid and strong barrel for long distance shooting
  • Fluting provides weight reduction, while providing a more rigid than a standard barrel of the same weight
  • M4 feedramps ensure positive feeding with a variety of 5.56x45mm ammunition
  • 1-8 twist allows for a variety of bullet weights to be used, and works especially well with heavier bullets
  • ½-28 muzzle is compatible with a wide range of AR-15/M16 muzzle devices

AR-15, Issue:11, Page:018
Big Book Catalog, Issue:69, Page:017

416R Stainless Steel. Matte black finish. 18” length. Mid-length gas system. .936” OD at Gas Port. ½-28 Muzzle Threads. 1-8 twist. M4 feedramps. 5.56x45mm chamber.

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In Stock

Cartridge: 5.56 mm NATO

Barrel Weight: 3.22 lbs

Contour: Heavy

Finish: Black

Length: 18

Gas System Length: Mid-Length, ...

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