+1 570 368 3920

HK MR556A1 5.56 16.5" 9" M-LOK Handguard Black Rifle w/(1) 10rd Mag and Troy Microsights 81000534

SKU 81000534-HK

FFL Restrictions
FFL Requirements
This item can only be shipped to a Licensed Federal Firearms Dealer. Please see our Shipping Policy to review firearms shipping requirements.
Export Restrictions
Government Export Restriction
This item may be regulated for export by the U.S. Department of State or the US Department of Commerce. Please see our Export Policy.


H&K’s MR556A1 takes much of its design from the Hk416, and is a perfect platform for both tactical and competition applications. The MR556A1 utilizes the H&K exclusive gas piston operating system, which employs a piston as well as a solid operating “pusher” rod instead of the gas tube used by most AR-type rifles. This “closed” operating piston system prevents excess gasses and hot carbon fouling from entering the receiver, which drastically reduces the risk of malfunctions that direct-impingement ARs are prone too. The closed piston system also helps prevent dust, sand, mud and other debris from entering for superior reliability in adverse conditions. In addition, the MR556A1’s barrel is made using H&K’s famous cold-hammer forging process and is constructed with highest quality cannon grade steel.

  • Cold-hammer forged barrel
  • “Closed” gas piston system
  • Full length flattop picatinny rail
  • M-LOK handgaurd


  • Caliber:5.56 NATO
  • Weight:9.1 lb.
  • Rifle Overall Length:33.75" - 37"
  • Action:Gas Piston Semi-Automatic
  • Trigger:~7.64 lb Pull Weight
  • Safety:Ambidextrous Safety Selector
  • Rifle Barrel Length:16.5"
  • Rifle Barrel Twist:1:7"
  • Barrel Thread Pitch1/2x28
  • Rifle Stock:HK Adjustable Stock
  • Scope Mount:Picatinny Rail
  • Magazines Included:(1) 10 Round
  • Iron Sights Yes
  • Caliber or Gauge:5.56 x 45mm NATO
  • HandednessAmbidextrous
  • Item ConditionNew
  • Product TypeRifles
  • UPC642230262577
  • MPN81000582

Customer Reviews

Review this product


Get News, Deals and Updates

EuroOptic International Sites:

Please Wait...