The tactical pcp42 mil-spec stock is compatible with mil-spec buffer tubes.It features a sleek design with metal qd base on each side for qd slings and several molded in 1.5" sling loops.The full length 3.75"/95mm cheek piece (#052) is ideal for proper cheek positioning for mounted optics.The cheek piece is raiseable 6 positions of height up to 1.25"/32mm of adjustment.An integrated rubber butt pad for non-slip secure shouldering comfort and recoil mitigation.This stock also features a unique latch mechanism first click for adjusting stock position and a second full click for mounting/demounting from the buffer tube.Tube Included: No