CMMG AR-15 ZEROED Gunbuilder’s Lower Parts Kit

Customization is endless with the AR15 platform, which is why the CMMG ZEROED Mk4/AR15 Gunbuilders 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. Specifications for CMMG AR-15 ZEROED Gunbuilder’s Lower Parts Kit: Manufacturer: CMMG Gun Make: AR Platform Gun Model: AR-15 Condition: New Package Contents: CMMG AR-15 ZEROED Gunbuilder’s Lower Parts Kit 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