Heckler & Koch MR556A1, Semi-Automatic, 5.56 NATO/.223 Rem., 16" Barrel, 30+1 Rounds

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Key Features

  • 5.56 NATO/.223 Remington
  • 30+1 rounds
  • 16" free-floating heavy barrel (un-chromed)
  • Precise enhanced two-stage trigger
  • HK Free Floating Rail System
  • Gas pistol operating system
  • Includes (1) 30-rd. magazine

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Heckler & Koch® MR556A1 5.56 NATO / .223 Remington Semi-automatic AR Rifle

A direct descendant of the HK416, the MR556A1 is a AR-style Rifle developed by Heckler & Koch®. Like the HK416, the MR556A1 represents a major upgrade over conventional AR-type carbines and rifles. The MR556A1 uses the HK proprietary gas piston operating system, employing a piston and a solid operating "pusher" rod in place of the gas tube normally found in AR-style firearms. This method of operation virtually eliminates malfunctions that are common to direct impingement gas systems since hot carbon fouling and waste gases do not enter the receiver area. This is the same key feature critical to the success of the HK416 rifles used by leading military and law enforcement professionals. If top-end is what you're looking for, look no further.

  • German-made barrel produced by Heckler & Koch®'s famous cold hammer-forging process. The highest quality steel is used in this unique manufacturing process producing a barrel that provides superior accuracy and long service life
  • Gas piston operation stays cooler and cleaner
  • Picantinny rail machined into the top of its upper receiver for mounting optics and mechanical sights
  • Precise enhanced two-stage trigger adds significantly to the accuracy
  • HK Free Floating Rail System (FFRS) handguard has four MIL-STD-1913 Picatinny rails
  • Rail System can be installed and removed with simple tools, and returns to zero
  • Extended latch charging handle makes operating the rifle with a telescopic sight easier
  • Retractable buttstock can be locked into a solid, non-moving position by tightening an Allen screw
  • Major sub-assemblies, including the MR556A1 upper receiver / barrel assembly, are fully interchangeable with other high quality AR-style firearms
  • Includes (1) 30-rd. magazine

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Key Specifications

  • Item Number: 642960
  • Caliber: 5.56 NATO/.223 Remington
  • Action: Semi-automatic (gas piston)
  • Capacity: 30+1
  • Barrel length: 16"
  • Barrel style: German-made, cold hammer-forged, free-floating heavy barrel (un-chromed)
  • Barrel twist: 1:7"
  • Stock: 6-position collapsible
  • Pistol grip: A2
  • Sights: Various mechanical or optical sights
  • Handguard: Free-floating quad rail
  • Flash hider: A2
  • Overall length: 33.9-37.68"
  • Overall weight: 8.6 lbs
  • Mfg. Number: HK MR556A1
  • UPC: 6 42230 24645 4