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ZEROED Lower Parts Kit, AR15, Gunbuilder's Kit
Customization is endless with the AR15 platform, which is why the CMMG® ZEROED™ Mk4/AR15 Gunbuilder’s Kit includes all of the essential parts except the most commonly upgraded ones: Trigger Guard, Fire Control Group, and Pistol Grip. Check out our interactive install walkthrough video below or read the CMMG Resources LPK Install article for an in-depth breakdown. All parts meet or exceed mil-spec. All installation hardware included.
- Bolt Catch Plunger, Spring, & Roll Pin
- Trigger/Hammer Retaining Pins
- ZEROED 60°/90° Adjustable Ambi Safety, Detent, & Spring
- ZEROED Ambi Magazine Catch & Spring
- ZEROED Magazine Release Button
- HD Pivot/Takedown Pins, Detents, & Springs
- Buffer Retainer & Spring