Brownells 75th Anniversary - A Shooting Heritage

Advanced Technology Coatings For Extended Service Life & Superb Performance

Match-quality barrels feature exotic coatings to give them maximum wear resistance and durability that standard barrel finishes just can’t match. NiB-X™ barrel has been nitrocarburized inside and out with a hardened finish that results in a bore life 50% greater than with traditional chrome-lining, plus the exterior is coated with WMD’s unique NiB-X nickel boron finish for outstanding surface wear resistance and heat dissipation. Made of 4150 steel, chambered for 5.56mm NATO, button rifled with 1-7" twist rifling, and machined to a standard M4 exterior profile with the M203 grenade-launcher cutout. Comes with a NiB-X coated barrel extension installed to help the bolt unlock exceptionally smoothly, especially when used with a WMD NiB-X coated bolt (available separately). Barrel extension has M4-type feed cuts to aid in smooth cycling.

AR-15, Issue:11, Page:022
Big Book Catalog, Issue:69, Page:020

SPECS: 4150 carbon steel, NiB-X (silver) finish. 16" OAL. Standard M4 carbine-length gas system. Chambered for 5.56x45mm NATO. NiB-X has 1-7" twist. ½"-28 tpi muzzle threads. Use .750" diameter gas block.

Online Only
In Stock

Cartridge: 5.56 mm NATO

Barrel Weight: 1.97 lbs

Contour: Carbine

Finish: Nickel-Boron

Length: 16

Gas System Length: Carbine, ...

click details to view more....