Lower Parts Kit


All the parts you need to get started on your next AR15 build in convenient color-coded packets to simplify assembly. Check out CMMG’s interactive install walkthrough video below or read CMMG’s LPK Install resource article for an in-depth breakdown. Combine this kit with a Buttstock or Brace kit to complete your lower group.



  • Bolt catch/roll pin
  • Bolt catch plunger/spring
  • Trigger guard/roll pin
  • Trigger
  • Trigger spring
  • Disconnector
  • Disconnector spring
  • Hammer
  • Hammer spring
  • Trigger/hammer retaining pins
  • Safety, detent, & spring
  • Magazine catch, spring, & release button
  • Pivot/takedown pins, detents, & springs
  • A2-style pistol grip/grip screw & washer
  • Buffer retainer/spring


18 in stock

Additional Information
Weight0.6250 lbs
Dimensions4.5000 × 5.7500 × 1.7500 in

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