Hk Mr556 A4 5.56 NATO 11" 30-Round Carbine

The Heckler & Koch MR556 A4 in 5.56 NATO with an 11-inch barrel is a modern, semi-automatic rifle engineered for operators who demand precision in tight quarters. Built on the proven roller-delayed blowback system that defines H&K's reputation for reliability, this carbine delivers consistent performance across diverse operational environments—from close-quarters work to intermediate-range engagement. The 11-inch barrel reduces overall length while maintaining adequate velocity from the 5.56 cartridge, making this platform ideal for confined spaces, vehicle ops, and situations where maneuverability is critical.

The MR556 A4 features H&K's stamped-steel receiver construction and comes equipped with a 30-round magazine, enabling sustained fire capability standard in intermediate rifle roles. The matte black finish provides low-reflectivity corrosion resistance suitable for field use. At its core, the roller-delayed system absorbs recoil more smoothly than direct-impingement designs, reducing wear on critical components and improving shot-to-shot consistency. The A4 designation carries H&K's commitment to precision engineering—each rifle is cold-hammer-forged and test-fired to verify function and accuracy before leaving the factory.

This platform serves law enforcement tactical teams, military units conducting CQB training, and civilian shooters operating in precision-rifle communities where German engineering and proven mechanical design matter. The compact profile and intermediate caliber make it practical for shooters prioritizing maneuverability without sacrificing the stopping power and ballistic performance of 5.56 NATO. Buyers should verify local and state regulations regarding barrel length and overall rifle configuration before purchase, as 11-inch firearms fall under specific federal and state classification rules depending on jurisdiction.