Skip to main content
We may get paid by partner for deals, including promoted items

Menu

Product Description

Customization is endless with the AR15 platform, which is why the CMMGZEROED(TM) 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 PinTrigger/Hammer Retaining PinsZEROED 60deg/90deg Adjustable Ambi Safety, Detent, & SpringZEROED Ambi Magazine Catch & SpringZEROED Magazine Release ButtonHD Pivot/Takedown Pins, Detents, & SpringsBuffer Retainer & Spring

ZEROED Lower Parts Kit, AR15, Gunbuilder's Kit

at CMMG
$89.95
In Stock at CMMG
Buy Now at CMMG
Secure checkout Easy returns
or compare prices

Product Details

Brand CMMG

More from CMMG

Bass Pro Shops
Last Updated:
Aug 11, 2026 12:33 PM
Cabela's
Last Updated:
Aug 11, 2026 12:20 PM
Cabela's
Last Updated:
Aug 11, 2026 12:16 PM
Cabela's
Last Updated:
Aug 11, 2026 12:16 PM
Cabela's
Last Updated:
Aug 11, 2026 12:07 PM