HK MR223 & MR223A1 Rifles, .223, 16.5" or 14.5" Barrel

Heckler & Koch


  • MR223 - 16" Barrel
  • MR223A1 - 14.5" Barrel
  • Each Rifle Comes with 1 Standard H&K Steel 5-Round Rifle Magazine

A direct descendent of the HK416, the MR223 is a semi-automatic rifle developed by Heckler & Koch as a premium level commercial/civilian firearm with match rifle capability. Like the HK416, the MR223 is a major product improvement over conventional AR-type carbines and rifles. 


  • The MR223 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 AR15/M16/M4-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 customers.
  • The HK Free Floating Rail System (FFRS) handguard has four MIL-STD-1913 “Picatinny” rails and allows all current accessories, sights, lights, and aimers used on M4/M16-type arms to be fitted to the MR Series. The HK rail system can be installed and removed with simple tools and returns to zero when reinstalled.
  • The MR223 also has a Picantinny rail machined into the top of its upper receiver for mounting optics and mechanical sights. Unlike earlier prototypes, major subassemblies, including the MR223 upper receiver/barrel assembly, are fully interchangeable with other high quality AR-style firearms. MR223 upper receiver kits can be used to retrofit competing legacy AR systems.
  • Like the famous HK416, the MR223 uses a 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. But unlike the HK416, the MR223 does not use a chrome-lined barrel. Chrome-lining can sometimes mask bore imperfections and negatively affect accuracy. For the new series of Heckler & Koch semi-automatic MR rifles, HK designers and engineers believe best accuracy comes with an unlined bore.
  • The unchromed barrel has an internal profile of 6 lands and grooves with a 1 in 7 inch (178 mm) twist. It is also moderately “swagged” with a slightly smaller internal diameter at the muzzle end than the chamber end. This feature has a positive effect on bullet accuracy and velocity. The thick, heavy contour 16.5-inch MR223 barrel also contributes to its excellent accuracy.
  • A precise enhanced two-stage trigger adds significantly to the accuracy of the MR223 and an extended latch charging handle makes operating the rifle with a telescopic sight easier. The retractable buttstock can be locked into a solid, non-moving position by tightening an Allen screw in the bottom of the stock. Special target rifle takedown pins ensure the upper and lower receivers are firmly mated for accurate performance.


  • Finish Type: Matte Black Metal Work w/ Black Synthetic Furniture
  • Sight Type: None. Standard 1913 Picatinny Rail on top to Allow for Mounting of Almost any Optical Sight.
  • Safety Type: Manual Operated Safety
  • Grip Style: Standard HK Pistol Grip
  • Magazine Capacity: 5 rounds

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