Yankee Hill

Surface: Diamond Fluted - Length: 16 - Weight: 1.81 lbs. - Material: 4140 Chrome Moly Steel - Chamber: 5.56x45mm NATO - Twist Rate: 1 in 7 - Chrome Lined: No - Finish: Melonite QPQ - M4 Feed Ramps: Yes - Muzzle Thread Pattern: 1/2-28 - Gas Port Location: Carbine - Exterior Diameter at Gas Port: 0.750 - This YHM barrel features a 5.56x45mm NATO chamber for full compatibility with surplus mil-spec ammunition or commercial 223 Remington ammunition. Constructed of 4140 chrome moly steel with a threaded muzzle the barrel is Melonited for ultimate surface protection. The melonite coating provides a thinner surface than chrome-lining so bore friction is reduced for better accuracy. In addition melonite is harder than chrome-lining providing a longer wear life. - This barrel is an excellent choice for a general purpose AR rifle build. It is perfectly suited for use at the range in a 3-Gun match or in the field pursuing game.