MPN: 55CA6C5


  • Comes with all the parts needed to get started on you lower receiver
  • Packaged in color-coded bags that organize related parts for easy assembly
  • All parts meet or exceed Mil-Spec


  • Material: Steel
  • Finish: Black


  • 1x Takedown Pin
  • 1x Receiver Pivot Pin
  • 2x Takedown Pin Detent
  • 2x Takedown Pin Detent Spring
  • 1x Bolt Catch
  • 1x Bolt Catch Plunger
  • 1x Bolt Catch Spring Pin
  • 1x Bolt Catch Spring
  • 1x Buffer Retainer
  • 1x Buffer Retainer Spring
  • 1x Hammer Pin
  • 1x Trigger Pin
  • 1x Hammer Spring
  • 1x Trigger Spring
  • 1x Magazine Catch
  • 1x Magazine Catch Spring
  • 1x Magazine Release Button
  • 1x Safety Selector
  • 1x Selector Detent
  • 1x Selector Detent Spring
  • 1x A2 Pistol Grip
  • 1x Pistol Grip Screw
  • 1x Pistol Grip Screw Washer
  • 1x Trigger Guard and Roll Pin


  • AR-15


Buying every part for an AR-15 lower receiver can be tedious. Make it as simple as possible by getting the CMMG 55CA6C5 lower parts kit! This convenient kit includes everything you need to get your lower receiver up and running.

Start Your Build Right with This CMMG Lower Parts Kit

The parts are held to CMMG's strict quality standards, so you can be sure you're getting some of the best in the industry with this kit. They have been carefully machined and inspected to ensure a perfect fit on your Mil-Spec lower receiver. Plus, the parts are organized into color-coded packages to make the installation process as smooth as possible. This CMMG lower parts kit is the easiest and most economical way to complete your lower receiver with high-quality parts.

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