Like the HK416, the MR556A1 uses a proprietary HK short-stroke gas piston in place of the direct-gas-impingement system found on lesser AR15-style rifles that propels exhaust gas into the upper receiver to operate the action.

Sep 18, 2024 · The KGM R556A1 is a compact yet robust suppressor designed to meet and exceed SOCOM specifications for full-auto firing, accuracy, repeatability, sound suppression, and minimal impact on a rifle’s operating system. The R556A1 has successfully surpassed over 20 SOCOM SURG firing cycles and continued to perform.

A practically flawless weapon system, the H&K MR556A1 is a direct descendant of the HK416 yet offers even more refinement for accuracy, greater customization, and dry-firing compatibility.

HK MR556A1 16.5" 10 Round 5.56x45 Rifle, Black - 81000580 Out of Stock Notify When In Stock hourglass_top

HK MR556A1 5.56mm NATO 16.5in Black Semi Automatic Modern Sporting Rifle - 30+1 Rounds - A direct descendent of the HK416, the MR556A1 is a semi-automatic rifle developed by Heckler Koch as a premium level commercial/civilian firearm with match rifle capability.

HK MR556A1 5.56mm NATO 16.5in Black Semi Automatic Modern Sporting Rifle - 10+1 Rounds - A direct descendant of the world-famous HK416, the MR556A1 is the commercial carbine from the same DNA. It offers the battlefield-proven reliability, durability and precision you would expect from a rifle that bears the name Heckler & Koch.

A direct descendent of the HK416, the MR556A1 is a semi-automatic rifle developed by Heckler & Koch as a premium level commercial/civilian firearm with match rifle capability. Like the HK416, the MR556A1 is a major product improvement over conventional AR-type carbines and rifles.

A direct descendant of the HK416, the MR556A1 is a semi-automatic rifle configuration with match rifle capability developed for civilian users.