HK MR556 Build (Piston Ar 15) MR 556 HK 416 AR15

Up for auction is a new and unfired HK MR 556 upper BD Date code (2013) on an LRB arms Lower. An AR 15 lower is not limited to MilSpec and Hk Maritime mags allowing the use of many great polymer magazines. LWRC Buffer tube assembly with maritime drainage ports (includes LWRC castle nut and index plate) HK E1 416/417 Convex stock set (MR556 comes with the E2 concave stock) HK Variant 2 416/417 Battle grip Extended Magazine Release AAC Vertical foregrip Trigger has a set screw installed to minimize pre travel and overtravel (expect 6 pound pull) HK Factory Hard Case is included Ships with A.R.M.s sights