It offers the battlefield-proven reliability, durability and precision you would expect from a rifle that bears the name Heckler & Koch. The MR556A1 is assembled in the USA using US and German-made components and uses many of the same parts and assemblies developed for the HK416.

The HK MR556A1 can fire 5.56 NATO and .223 easily, and offers a very smooth and accurate shooting experience. The short-stroke gas piston system is simple and performs reliably whether unsuppressed or suppressed.

A direct descendant of the HK416, the HK MR556 for sale offers impeccable durability, precision, and battle proven reliability. This rifle utilizes a "closed" short stroke gas piston system resulting in a firearm that performs cleaner, cooler, and more reliably, making direct gas impingement system malfunctions a thing of the past.

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 75th Anniversary MR556A1 5.56 NATO Semi-Auto Tropentarn Rifle w/(4) 30rd Mags 81001004

The HK 556 for sale is an elite civilian firearm with competition-level precision and performance that outclasses typical AR-style carbines.

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 …