Heckler & Koch MR556A1 5.56x45mm 16.5" 10+1 Semi-Auto Rifle 81000580

Heckler & Koch MR556A1

The Heckler & Koch MR556A1 is a semi-automatic rifle chambered in 5.56x45mm with a 16.5 inch barrel and a 10+1 capacity. It features a proprietary short-stroke gas piston system that keeps exhaust gases out of the receiver for cleaner and more reliable operation even in adverse conditions. The design draws from the battle-proven HK416 and includes a US-assembled construction with German components for exceptional durability and precision.

This MR556A1 model delivers superior accuracy through its cold hammer-forged barrel and positive lock-up while the optic-ready configuration supports a wide range of sighting systems. The adjustable stock allows for quick length-of-pull changes and the overall build emphasizes reliability with a closed piston system that runs cooler than traditional direct impingement designs. A 10-round magazine is included for immediate use.

Ideal for tactical applications, precision shooting, and those seeking HK reliability in a commercial platform, the Heckler & Koch MR556A1 combines legendary engineering with modern features. Its piston-driven operation, robust construction, and high-quality components make it a top choice for shooters who demand performance in demanding environments.

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