Precision machined from forged 7075 T6 aluminum, the CMMG Mk4 AR-15 stripped lower receiver is the quality mil-spec lower ready to be the foundation for your next build. The Mk4 stripped lower comes standard in a Armor Black finish and can be assembled using any mil-spec Lower Parts Kit.
MK4, Stripped Lower Receiver, 223 Remington/556NATO, Cerakote Finish, Armor Black
Available on backorder
What does 'Available on backorder' mean?For many of these items, they are simply 'special order', so we can have them in only a few days. Some products, however, carry extended lead times and may not be immediately available. If you have any questions about the lead times on a particular product, please contact us and we'll be happy to assist you.