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RSR Part #: HKMR556-A1 Manufacturer Part #: MR556-A1

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HK, MR556, Semi-automatic Rifle, 223Rem/556NATO, 16.5" Barrel, Black Finish, 6 Position Collapsible Stock, 30Rd, 1 Magazine, 9" Modular Rail System


WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

  • Retractable Buttstock
  • Piston Operating System
  • Cold Hammer Forged Barrel
  • Two-Stage Trigger

Product Description

A direct descendent of the HK416, the MR556A1 is a semi-automatic rifle developed by Heckler & Koch as a premium level commercial/civilian firearm with match rifle capability. Like the HK416, the MR556A1 is a major product improvement over conventional AR-type carbines and rifles.


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