This semi-automatic rifle is a commercial and civilian-level firearm that can also breach into the match rifle world. The featured HK proprietary gas piston operating system replaces the typical gas tube found in AR15, M16, and M4 style firearms.

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.

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.

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.

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

For the new series of Heckler & Koch semi-automatic MR rifles, HK designers and engineers believe best accuracy comes with an unlined bore. Used with the HK Free Floating Rail System, the barrel does not touch the handguard, ensuring the barrel is …

As HK Celebrates their 75th anniversary, there is a very limited opportunity to own a piece of history with the purchase of an HK 7th Anniversary MR556A1 Rifle. Only 500 of these rifles will be sold. They are decorated in either Flecktarn or Tropentarn camo patterns used by the German Armed Forces, or Bundeswehr.

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. Features. Was the information on this page helpful?

Utilizing a proprietary, closed HK® gas piston and pusher-rod operating system, the HK MR556-A1 FDE Semi-Auto Rifle is a virtually flawless weapon system, ideal for a variety of combat and civilian...