American Made Parts for American Rifle Builders


CMMG Gun Builder's Lower Parts Kit, AR15 Mil-Spec kit without Grip and Fire Control Group

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This Gun builders kit includes most of the necessary parts to build up your lower group except the commonly upgraded parts. Does not include Trigger Guard, Fire Control Group, or pistol grip.

Lower Parts 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
  • Buffer Retainer
  • Buffer Retainer Spring
  • Bolt Catch
  • Bolt Catch Plunger
  • Bolt Catch Spring Pin
  • Bolt Catch Roll Pin