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.

Browse: H&K MR556 A1 Rifles. This 30-round semi-automatic rifle features Heckler and Koch’s cutting-edge gas piston operating system and M-LOK mounting system to put together a solid, …

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 …

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.

2021年3月11日 · Built around the legendary HK416 platform, the Heckler & Koch MR556A1 is the newest variant available to the commercial market. This newest model carries over tried and true features like HK’s short-stroke gas piston system with some new refinements like an M-LOK rail.

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MR556A1 barrels are unlined for superior accuracy, while maintaining exemplary service life under semi-automatic fire.The MR556A1 barrel has six lands and grooves and a 1 in 7" twist. It is a taper-bore configuration with a slightly smaller internal diameter at the muzzle than at the chamber end for improved accuracy and velocity.

HK MR556 A1 5.56/.223, 16.5" Medium Contour Barrel, M-LOK, Black, 30rd. HK Heckler and Koch 81000579. The MR556A1 is a direct descendant of the world-famous HK416. It offers the civilian semi-automatic shooter battlefield-proven reliability, durability and precision you would expect from Heckler ...

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.