Spike's Tactical STU5435MLS Complete Upper Receiver 5.56 NATO 16" Mid-Length, Black Phosphate - STU5435MLS

Complete AR-15 upper receiver assembly chambered in 5.56x45mm NATO with a 16" mid-length cold hammer forged barrel featuring 1:7 twist rate and black phosphate finish. Includes 7075-T6 aluminum receiver, 12" SAR3 free-floating handguard, A2 front sight post, and A2 flash hider. Drop-in replacement upper compatible with standard AR-15 lower receivers.