DB Barrel – 5.56mm, Carbine-Length, 5.5″, Medium, 4150, Black Nitride, 1:8

Manufactured by Diamondback Barrels Co. – Chambered in 5.56mm – Gas System: Pistol Length – Length: 5.5″ – Contour/Profile: Heavy – Material: 4150 Chrome Moly – Coating: Black Nitride – Twist: 1:8 – Thread: 1/2 x 28 – Rifling: Button Rifled 5-Groove Bore – M4 Feed Ramps – 11 ° Target Crown’