CMMG ZEROED Lower Parts Kit, AR15

Complete your AR15 lower receiver with ease using the CMMG® ZEROED™ Mk4/AR15 lower parts kit. Made in the USA and packaged in color-coded packets, each piece is designed for hassle-free assembly. You can check out CMMG’s interactive install walkthrough video or read the detailed CMMG Resources LPK Install article for a step-by-step breakdown. To finish your pistol or rifle lower, don’t forget to add a Buttstock or Brace kit. All components meet or exceed mil-spec, and installation hardware is included.