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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 ZEROED Ambi Magazine Catch Spring ZEROED Magazine Release Button HD Pivot/Takedown Pins Detents Springs Buffer Retainer Spring
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
