Lower Receiver, Mk4/AR15

Lower receiver for AR-15 Mk4 platform. Precision machined from forged 7075-T6 aluminum. Mil-spec Mk4 lower receiver ready to be the foundation for your next build. The Mk4 stripped lower comes standard in your choice of seven Cerakote finishes and can be assembled using any mil-spec Lower Parts Kit. If you want to add some customization to your next AR build, consider upgrading to one of ten different Cerakote color options and pairing the Mk4 stripped lower with our Gunbuilder’s Lower Parts Kit and picking out the Trigger Guard, Pistol Grip, and Fire Control Group to make your project whatever you imagine. Don’t forget to check out CMMG’s Rifle Stock Kits and Pistol Brace Kits to round off the parts for the AR15 Mk4 stripped lower. Lifetime Quality Guarantee.