HK MR556 A1 5.56x45mm NATO AR-15 Semi Automatic Rifle
Product Features & Specifications HK 81000579 MR556 A1 5.56x45mm NATO 16.50" 30+1, Black, Adjustable Stock, Polymer Grip, Gas Piston Driven System A direct descendant of the HK416, the MR556A1 is a semi-automatic rifle configuration with match rifle capability developed for civilian users. The M
