CMMG ZEROED AR15 Lower Parts Kit

CMMG, Inc.
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Finish your next AR15 lower receiver with the CMMG® ZEROED™ Mk4/AR15 lower parts kit. Every piece is made here in the USA and comes in convenient color-coded packets to make assembly a breeze. Check out our interactive install walkthrough video below or read the CMMG Resources LPK Install article for an in-depth breakdown. Don’t forget a Buttstock or Brace kit to complete your pistol or rifle lower. All parts meet or exceed mil-spec. All installation hardware included.

All the parts you need to get started on your next AR15 build in convenient color-coded packets to simplify assembly.

Kit Includes:

  • ZEROED Extended Bolt Catch AR15
  • Bolt Catch Plunger, Spring, & Roll Pin
  • ZEROED Trigger Guard, Screw, & Roll PIn
  • Trigger & Trigger Spring
  • Disconnector & Disconnector Spring
  • Hammer & Hammer Spring
  • Trigger/Hammer Retaining Pins
  • ZEROED 60°/90° Adjustable Ambi Safety, Detent, & Spring
  • ZEROED Ambi Magazine Catch & Spring
  • ZEROED Extended Magazine Release Button
  • HD Pivot/Takedown Pins, Detents, & Springs
  • ZEROED Pistol Grip, Grip Screw, & Washer
  • Buffer Retainer & Spring
Sub Category:
Lower Parts