Experience battlefield-proven reliability with the Heckler & Koch MR556A1, a semi-automatic rifle engineered for precision and performance. This 5.56 NATO platform features HK's proprietary short-stroke gas piston system—the same technology trusted in the legendary HK416—which operates cleaner and cooler than direct-impingement designs, while virtually eliminating receiver fouling even in harsh environments. Built in the USA with premium German and American components, the MR556A1 delivers consistent accuracy through its cold hammer-forged 16.5" barrel, complemented by a free-floating M-LOK handguard, ambidextrous controls, and a reinforced polymer stock. Whether you're a competitive shooter, tactical enthusiast, or dedicated marksman, this rifle combines HK's uncompromising engineering with the modularity and familiarity of the AR platform.
