CMMG AR15 Stripped Lower Receiver

A Premium Mil-Spec Foundation for Custom AR-15 Builds

The CMMG Mk4 AR-15 Stripped Lower Receiver with Custom Cerakote Finish is precision machined from forged 7075-T6 aluminum to deliver the strength, reliability, and consistency expected from a true mil-spec lower receiver. Designed as the backbone of your next build, the Mk4 lower provides a proven platform for a wide range of AR-15 configurations.

Built to mil-spec dimensions, this stripped lower is compatible with standard AR-15 lower parts kits and components, making it an excellent choice for both first-time builders and experienced enthusiasts looking for a dependable, high-quality base.

Custom Cerakote Finish Options

The Mk4 stripped lower comes standard in your choice of Cerakote finishes, offering enhanced abrasion resistance, corrosion protection, and long-lasting durability. For builders seeking a truly personalized rifle, additional Cerakote color options are available to help you create a build that reflects your individual style.

Built for Customization

If you’re looking to take your build further, the CMMG Mk4 lower pairs perfectly with a wide range of aftermarket components. Upgrade your project by combining this lower with a quality lower parts kit and selecting your preferred trigger guard, pistol grip, and fire control group to create a rifle tailored to your exact needs.

To complete your build, consider pairing the Mk4 stripped lower with compatible rifle stock kits or pistol brace kits to finish out your AR-15 configuration.

Construction & Compatibility

• Precision machined from forged 7075-T6 aluminum
• Mil-spec dimensions for broad AR-15 compatibility
• Compatible with standard AR-15 lower parts kits
• Custom Cerakote finish for durability and personalization
• Ideal for custom, performance, and mission-specific builds

Perfect For

• Custom Cerakote AR-15 builds
• Builders seeking a premium mil-spec lower receiver
• First-time and experienced AR-15 builders
• Personalized rifles and project builds

FFL Required — Important Purchasing Information

ALL LOWER RECEIVER SALES REQUIRE VALID FFL INFORMATION.

How to Complete Your Order

1. Add the item to your cart and proceed to checkout.
2. Under the Shipping section, enter the company name and address of the FFL holder you want the lower shipped to.
3. Under the Billing section, enter your personal billing address.
4. Complete your order.

FFL Documentation

If you are the FFL holder, please email a copy of your FFL (PDF or JPG preferred) to: [email protected]

If you are not the FFL holder, we will contact the selected FFL to verify their license prior to shipment.

Shipping & Verification Notes

• Serialized items will only ship to a verified FFL holder
• FFL verification may take a few business days
• We recommend notifying your chosen FFL of the incoming shipment in advance

We will contact you by phone or email if there are any issues verifying FFL information.

Unverified FFL Policy

If FFL information cannot be verified and the buyer is unresponsive for 30 days after purchase, the order will be released and a store credit will be issued for the purchase amount minus a 15% restocking fee.

Questions?

If you have any questions, please contact us through our website contact form or email us directly at [email protected].