ADAMS ARMS AR-15 P1 GAS PISTON UPPER RECEIVER ASSEMBLY 5.56X45MM NATO 16” BARREL

This Adams Arms P1 Mid Gas Piston Upper Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after installation onto any standard AR-15 lower receiver. The Base Mid upper comes equipped with a 16″ melonite-finished barrel, A2 flash hider, bolt carrier group, charging handle, picatinny rail gas block, delta ring ass