The Brownells AR-15/M16 5.56 Chrome Lined Barrels feature chrome lined bores & chambers, with a matte black phosphate finish. Barrels are available in 16” or 10” lengths, and are chambered in 5.56x45mm NATO. The 1-7 twist allows for excellent accuracy, especially with heavier and/or longer bullets. Muzzle is threaded ½-28 and the barrel extension features M4 feedramps. Both barrels have the classic “Government” profile, which is light under the handguards, and .750” at the gas block.
AR-15, Issue:11, Page:018
Big Book Catalog, Issue:70, Page:016
SPECS: Fits - AR-15/M16 rifles. Finish - Matte black phosphate, chrome lined. Profile - Government. Muzzle threads - 1/2-28. Chamber - 5.56x45mm NATO.