Upper Receivers/Conv Kits

Adams arms upper p1 5.56mm 16" piston black Other Features: M4 barrel contour, 4150 chrome moly vanadium, muzzle thread 1/2x28, m4 feed ramps, includes bcg carbine length gas system, short stroke piston operated

Adams arms upper p1 5.56mm 11.5" piston black Other Features: M4 barrel contour, 4150 chrome moly vanadium, muzzle thread 1/2x28, m4 feed ramps, includes bcg carbine length gas system, short stroke piston operated, all nfa rules apply

Adams arms upper p2 5.56mm 16" piston m-lok black Other Features: M4 barrel contour, 4150 chrome moly vanadium, muzzle thread 1/2x28, m4 feed ramps, includes bcg mid-length gas system, short stroke piston operated, adams arms m-lok rail, ambidextrous...