The McMillan RH Tac 50-A1-R2 .50 BMG rifle features a detachable box 5-round magazine, removeable stock, adjustable saddle-type cheekpiece, 4 flushmount cups with 1-1/4" sling loopos, A1 bipod, decelerator pad, LOP spacer system, match grade, hand lapped, free floating, fluted 29" navy contour barrel, threaded muzzle, threaded McMillan muzzle brake, and a NP3 bolt.