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.

Fully ambidextrous controls, lighter weight and a slimmer profile make the new A4 easier to operate, manipulate and employ. For those who demand an AR with unmatched capability and uncompromising reliability and durability, the MR A4s remain the top tier solution.

The MR556A1 is an improved version of the MR556 with a free floating modular rail system, Picatinny rail, and interchangeable receiver assemblies. The MR556A1 is the civilian version of the HK416, a fully automatic weapon used by Navy Seals still today.

Omaha Outdoors offers the Heckler and Koch MR556 AR 15 rifle in 10 and 30 round variations, as well as a competition model for high intensity shooters. Heckler and Koch is a world …

Its adjustable gas regulator allows the operator to tune the action specifically for suppressed or unsuppressed deployment. The MR A4 is the top-tier solution for those who demand performance and reliability over everything else.

Heckler & Koch MR556 .223 Rem/5.56 Semi-Automatic AR-15 Rifle - MR556LC-A1 Out of Stock Notify When In Stock

The HK MR556 A4 represents the pinnacle of precision engineering and tactical performance. Designed for uncompromising accuracy, durability, and reliability, this semi-automatic rifle is a civilian variation of the legendary HK416, trusted by military forces worldwide.

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.

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.