CMMG 55AFC5B 5.56mm 30-Round Black Polymer Magazine - Fits MK4/AR-15

The CMMG 55AFC5B is a 5.56mm detachable box magazine purpose-built for AR-15 and MK4-pattern platforms. Featuring a 30-round capacity, this magazine delivers reliable feeding for both 5.56 NATO and .223 Remington cartridges.

Constructed with an advanced polymer body in black, the 55AFC5B is built to stand up to the elements while keeping carry weight to a minimum. CMMG's signature styling adds an enhanced grip texture for confident, snag-free handling during reloads at the bench or on the range.

The 55AFC5B fits standard AR-15 and CMMG MK4 lower receivers, making it a versatile spare for use across multiple rifles in your safe. Whether you are stocking range gear or just want an affordable, dependable magazine to keep on hand, this CMMG polymer mag delivers solid performance at a value price point.