CMMG MK3 Gun Builder's Lower Parts Kit

SKU# 3023 | by CMMG
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The 308 version includes LR308 takedown and pivot pins as well as an improved bolt catch. The 308 kits also include a bolt catch screw in place of the AR-15 pin.

Kit Includes:

  • Takedown pin
  • Receiver pivot pin
  • Takedown pin detent (2)
  • Takedown pin detent spring (2)
  • Hammer and trigger pin (2)
  • Safety selector
  • Selector detent
  • Magazine catch
  • Magazine catch spring
  • Magazine release button
  • Bolt catch
  • Bolt catch plunger
  • Bolt catch spring
  • Bolt catch spring pin
  • Buffer retainer and buffer retainer spring.

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