EDEMO Diamondback Barrels AR-15 5.56 NATO Barrel Carbine 10in Barrel 1-8 Twist Rate 1/2x28 TPI 556C10M50B8 EDEMO1. 56 NATO AR-15 Carbine Barrel is machined in house on state-of-the-art CNC machines and are thoroughly inspected at multiple stages of the...