CMMG Lower Receiver
The stock information shown above is very accurate and updated dynamically. In stock items are shipped the same day when ordered before 2pm, or can be collected after ordering. Warehouse items will arrive with us in the timescale shown. Collection is by appointment only and must be booked in advance. Our phone lines can get extremely busy and email is the most efficient way to communicate with us!
CMMG Lower Receiver, Mk4/AR15
Precision machined from forged 7075 T6 aluminium, the CMMG Mk4 AR15 lower receiver is the quality mil-spec lower 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 customisation to your next AR build, consider upgrading to one of 10 different cerakote colour 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.
Shipping Methods
Collection/On-Site Service
Collect your order from our premises in Hampshire or a Blue RPC club shoot. Have a chat with us and a browse whilst you're here!
Royal Mail 24
Despatched same working day if ordered before 1400, with next day delivery aim, but is dependant on Royal Mail.
International Shipping
Despatched same working day if ordered before 1400 GMT. Our website automatically detects your country, so if it lets you order it then we can ship there!
Firearms and Ammunition
See the RFD Transfer and Club Collection page for more details.