CMMG AR-15 Zeroed Lower Parts Kit 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.
Kit Includes:
Bolt Catch Plunger Spring & Roll Pin
Trigger/Hammer Retaining Pins
ZEROED 60°/90° Adjustable Ambi Safety Detent & Spring
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