The CMMG MK4/AR-15 5.7x28mm AR Conversion Magazines feature a number of improvements. From the new stylized texture grip and "5.7x28mm" engraving on the sides to the upgraded feed lips. Designed to work with CMMG 5.7x28 Radial Delayed Blowback Uppers and MK4/Mil-Spec AR15 lower receivers.
Capacity: 32 rounds
IMPORTANT SHIPPING INFORMATION: We cannot ship magazines that hold more than 10 rounds to CA, DC, HI, Cook County IL, MD, MA, NJ, NY, RI, VT or WA (regardless of if you are a Law Enforcement Officer or not). We cannot ship magazines that hold more than 15 rounds to CO or 17 rounds to DE and are unable to ship any magazines regardless of size to CT. We cannot accommodate any requests to disassemble, modify or change items before shipping to make them legal in a certain state.