WMD Guns 5.56 NATO 12.5in Medium Profile 1-8 Carbine 4150 CrMoV Nitride Black

WMD Guns 5.56 NATO 12.5in Medium Profile 1-8 Carbine 4150 CrMoV Nitride Black. 56 Barrel has been treated with Nitromet (salt bath nitrocarburized) inside and out with a hardened finish that results in a bore life 40percent greater than with traditional chrome-lining without affecting accuracy. Barrels are made of 4150 Chrome Moly Vanadium steel chambered for 5.56mm NATO and machined to a standard profiles. Specifications for WMD Guns 5.56 NATO Nitromet Barrel: Manufacturer: WMD Guns Color: Blac