Nitromet™ 5.56 10.5" Barrel 1:7 GP Carbine Gas System with NiB-X Barrel Extension

Description

Match-quality Nitromet™ 5.56 Barrel 10.5" GP barrel has been treated with Nitromet™ (salt bath nitrocarburized) inside and out with a hardened finish that results in a bore life 40% greater than with traditional chrome-lining without affecting accuracy. Barrels are made of 4150 Chrome Moly Vanadium steel, chambered for 5.56mm NATO, button rifled with 1-7" twist rifling, and machined to a standard M4 profile. Gas port drilled for a carbine length gas system, .750" diameter at the gas block. Comes with a NiB-X® barrel extension installed.