CMMG Zeroed AR308/AR10 Mk3 Lower Parts Kit


Ready to complete your AR10/LR-308 lower receiver? The CMMG® ZEROED™ AR10 (Mk3/.308WIN) lower parts kit is just the thing you need. All parts are made in the USA and comes in convenient color-coded packets to make assembly and part identification a breeze. Check out our interactive install walkthrough video below or read the CMMG Resources LPK Install article for an in-depth breakdown. Don’t forget a Buttstock or Brace kit to complete your pistol or rifle lower. 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.

3 in stock


Kit Includes:

  • ZEROED Extended Bolt Catch Mk3
  • Bolt Catch, Plunger, Spring, & Screw Pin
  • Trigger & Trigger Spring
  • Disconnector & Disconnector Spring
  • Hammer & Hammer Spring
  • Trigger/Hammer Retaining Pins
  • ZEROED 60°/90° Adjustable Ambi Safety, Detent, & Spring
  • ZEROED Ambi Magazine Catch & Spring
  • ZEROED Extended Magazine Release Button
  • Mk3 HD Pivot/Takedown Pins, Detents, & Springs
  • ZEROED Pistol Grip, Grip Screw, & Washer
  • Buffer Retainer & Spring

Additional information

Weight 15 oz
Dimensions 6 × 4 × 2 in