HK has all the best supplies and parts for all your MR556, HK416, HK416A5, HK CR556 needs. We carry a wide range of parts for your MR556, HK416, HK416A5, HK CR556 everything from magazines and sights to upper and lower parts. Shop our selection of upgrade parts and keep your rifle in top condition with proper maintenance. Our very knowledgeable staff is always available for any questions you may have about you rifle and parts you need to give you the ultimate shooting experience. We hope that you will consider HK PARTS as your sole source provider for all your HK parts and accessory needs!