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HK MR556 Fixed Buttstock, Semi-Automatic, 5.56x45mm, 16.5" Barrel, 30+1 Rounds, 30+1

Item # WX2-669285

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Details & Specs
Model: MR556FBA1
UPC: 642230253773

This semi-automatic rifle developed by Heckler & Koch is a premium level commercial / civilian firearm with match rifle capability. Like the HK416, this rifle is a major product improvement over conventional AR-type carbines and rifles. It 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. This is because hot carbon fouling and waste gases do not enter the receiver area.

More exciting features!

The HK Free Floating Rail System (FFRS) handguard has 4 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. It features 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. A precise enhanced 2-stage trigger adds significantly to the accuracy. And an extended latch charging handle makes operating the rifle with a telescopic sight easier.


  • Action: Semi Auto
  • Caliber: 5.56x45mm
  • Capacity: 30+1
  • Finish: Black
  • Stock: Fixed
  • Twist: 1:7 RH
  • Barrel Length: 16.5
  • Overall Length: 37.68
  • Weight: 8.6 lb
  • UPC: 642230253773
  • Vendor Part No: HK MR556FBA1
  • HK proprietary gas piston operating system eliminates malfunctions
  • Hot carbon fouling and waste gases do not enter the receiver area
  • 4 MIL-STD-1913 "Picatinny" rails support all current accessories, sights, lights and aimers
  • German-made barrel produced by Heckler & Koch's famous cold hammer forging process
  • Barrel has the highest quality steel for superior accuracy and long service life
  • Enhanced 2-stage trigger adds significantly to the accuracy
  • An extended latch charging handle makes operating the rifle with a telescopic sight easier

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Key Specifications
  • Caliber: 5.56x45mm / .223 Remington
  • Action: Semi-automatic
  • Capacity: 30+1
  • Barrel length: 16.5"
  • Barrel material: Highest quality steel
  • Barrel twist: 1:7" RH
  • Stock: Fixed
  • Upper receiver: Black aluminum
  • Lower receiver: Black aluminum
  • Sights (front / rear): Diopter
  • Overall length: 37.68"
  • Overall weight: 8.6 lbs.
  • Mfg. Number: HK MR556FBA1
  • UPC: 642230253773
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