Aim Sports AR5CUB8 Assembly 5.56x45mm NATO 10.50″ Black Nitride Barrel 7075-T6 Aluminum Black Anodized Receiver 10″ M-LOK Handguard for AR-15

Mil-Spec Forged 7075-T6 completely assembled upper rec. Type III hard coat anodized for maximum durability. M4 barrel extensions. 10.50″ 4150 CMV steel and bolt is 9310 tool steel. Both are nitride finish with excellent lubricity and corrosion resistance properties. Full auto profile. Includes Charging Handle.