Expected to ship within 15-30 business days. AR Parts Notice - State/local restrictions may apply in CA, CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
ZEROED Lower Parts Kit, Mk3, Gunbuilder's Kit
Have a particular grip or trigger you want to use in your next AR10/LR-308 build? The CMMG® ZEROED™ AR10 (Mk3/.308WIN) Gunbuilder’s Kit includes the essential parts except the most commonly upgraded ones like: 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. Not all .308 lowers are the same. Our kit is designed to work with our lowers (Gen 1 DPMS High-Pattern LR-308) and meet or exceed mil-spec. We would recommend checking with the manufacturer of your lower for compatibility of parts if you are not using our receiver.
- ZEROED Extended Bolt Catch Mk3
- Bolt Catch Plunger, Spring, & Screw Pin
- Trigger/Hammer Retaining Pins
- ZEROED 60°/90° Adjustable Ambi Safety, Detent, & Spring
- ZEROED Ambi Magazine Catch & Spring
- ZEROED Magazine Release Button
- Mk3 HD Pivot/Takedown Pins, Detents, & Springs
- Buffer Retainer & Spring