Out of stock
SKU: CMM55CA102CT
UPC: 810097506480
MPN: 55CA102CT
The CMMG Mk4 stripped lower receiver provides the serialized foundation for your next AR-15 build. Finished in Coyote Tan Cerakote, this tan AR15 lower matches desert-tone builds and pairs well with similar earth-toned furniture and accessories. CMMG machines this receiver from forged 7075 T6 aluminum—the same alloy specification trusted across military and law enforcement applications. Whether you're assembling a lightweight patrol carbine, a precision rifle, or a home defense platform, this lower gives you full control over your parts selection from the ground up.
CMMG holds this lower to mil-spec dimensional tolerances, ensuring reliable fitment with any standard upper receiver and lower parts kit on the market. The forged 7075 T6 aluminum construction delivers strength-to-weight characteristics that outperform cast alternatives, resisting stress fractures under sustained fire. Cerakote finish provides corrosion resistance superior to standard anodizing, maintaining appearance and protection through exposure to solvents, oils, and environmental moisture. The fire control pocket is cut to accept single-stage, two-stage, and drop-in trigger cassettes without modification. Threaded rear takedown pin detent hole and standard buffer tube threading simplify assembly for builders of all experience levels.
This receiver suits shooters building duty-grade carbines, ranch rifles, or designated marksman platforms where component selection matters. Starting with a quality stripped lower means you choose every spring, pin, and trigger that goes into the finished rifle. Pair it with components from our lowers category or browse our full rifle selection for complete builds. CMMG backs this receiver with their Lifetime Quality Guarantee against material and workmanship defects. We stock this and other CMMG products at our Florida location for fast shipping to your local FFL.
| Specification | Detail |
|---|---|
| Brand | CMMG |
| Model/MPN | 55CA102CT |
| SKU | CMM55CA102CT |
| UPC | 810097506480 |
| Shipping Weight | 1 lb |
| Material | Forged 7075 T6 Aluminum |
| Finish | Cerakote - Coyote Tan |
| Platform | AR-15 |
| Compatibility | Mil-Spec, any mil-spec lower parts kit |
| Warranty | Lifetime Quality Guarantee |
The Mk4 lower accepts any mil-spec AR-15 lower parts kit. This includes standard trigger groups, safety selectors, magazine releases, bolt catches, and takedown pins from manufacturers like CMMG, Aero Precision, or mil-spec parts suppliers. No proprietary components are required.
CMMG manufactures the Mk4 from forged 7075 T6 aluminum. Forging compresses the grain structure of the aluminum, creating a stronger finished product compared to billet-machined or cast alternatives. This makes forged lowers more resistant to impact and stress fractures.
The Coyote Tan Cerakote is a ceramic-based coating that bonds to the aluminum surface. It provides superior corrosion and chemical resistance compared to standard Type III anodizing, and maintains its color through cleaning solvent exposure and environmental weathering.
Yes. AR-15 lower receivers are the serialized, regulated component of the firearm under federal law. We ship this lower to your local FFL dealer, where you complete the transfer paperwork and background check according to your state's requirements.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
