HK416, MR556 A5 Style Castle Nut – Extended


HK 416, MR556 A5 Style Extended Length Castle Nut

The HK A5 extended buffer tube castle nut will fit both mil-spec & commercial buffer tubes. All Steel manufacture. Each castle nut is made to the exact specs and materials as the HK 416A5 castle nut. A rare offering in the USA. Made from ordnance grade steel.

  • HK MR556, CR556
  • HK 416
  • HK M27
  • HK 416-A5
  • Other AR, M4 & other M16 projects
  • Origin: USA
  • Brand: HK PARTS

Out of stock

SKU: HKP-18058

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