HK MR556 HKey Forearm Upper Kit

(1 customer review)


New HK Factory German MR556 Upper Kit With Key Mod Rail

Only a few available latest HK production.

HK MR556 Upper kit includes:

  • Complete MR556 upper receiver with HKey forearm and 2 rail segments
  • MR556 Bolt group Complete
  • Tungsten Filled HK Buffer
  • HK Buffer Spring
  • One 30 Round HK Steel Maritime Magazine

This unit will drop on any mil-spec AR-15 lower receiver.

No FFL required as the upper assembly is only considered a part and not an FFL item. This is a rare offering and extremely hard to find new.

  • Condition: New
  • Origin: German
  • Brand: Heckler & Koch
  • Caliber: 5.56 x 45mm / .223

Out of stock

Join the waitlist to be emailed when this product becomes available

SKU: HKP-17366

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