Hk Mr556 A4 5.56 NATO 11" 30-Round Carbine

The Heckler & Koch MR556 A4 5.56 NATO 11-inch carbine is a refined, civilian-legal interpretation of H&K's expertise in modern rifle design. It is purpose-built for operators, law enforcement, and serious civilian shooters who demand reliable performance in an ultra-compact platform. This rifle excels in close-quarters environments, vehicle deployment, and home-defense scenarios where a full-length carbine proves impractical.

The 11-inch barrel balances velocity retention with portability, making it ideal for those prioritizing maneuverability without sacrificing ballistic efficiency. Built on H&K's proven short-stroke piston system, the MR556 A4 delivers superior reliability and reduced carrier tilt compared to direct-impingement designs. This results in faster bolt cycling and extended component lifespan under sustained fire.

H&K's precision engineering ensures tight tolerances throughout the receiver, bolt carrier group, and barrel extension. With NATO-standard 5.56×45mm compatibility and a 30-round capacity, this platform supports extended engagement periods without frequent magazine changes. It is well-suited for tactical professionals conducting room-clearing or vehicle-mounted operations, as well as civilian shooters seeking a mil-spec-adjacent SBR alternative without NFA registration complexities.