CMMG AR15 Magazine Features The CMMG magazine s advanced polymer shell is engineered to shrug off the elements standing up to mud moisture and temperature swings that cause cheaper magazines to crack or warp over time. Its textured exterior gives shooters a positive secure grip during fast magazine changes which matters just as much in a training class as it does in a defensive scenario. The lightweight polymer build also keeps the loaded magazine s overall carried weight down compared to steel-bodied alternatives a real benefit for anyone running several spares on a belt or in a range bag. Fitting both MK4 and AR15 pattern rifles chambered in 5.56 NATO or .223 Remington this magazine is a versatile spare that works across most of the AR platform rifles already in a shooter s safe. Reliability comes down to consistent feeding and CMMG designed this magazine s follower and feed lips to maintain proper cartridge presentation from a full 30-round load down to the last round. The black polymer finish is low maintenance wiping clean easily after a dusty range session or a day in the field without the touch-up care steel magazines often demand. Whether it is loaded as a primary magazine or kept as a dedicated backup this CMMG magazine gives AR15 and MK4 owners a durable gritty-condition-ready option for sale at GrabAGun. CMMG AR15 Magazine Specifications Brand: CMMG Fits: MK4 / AR15 Caliber: 5.56 / .223 Rem Capacity: 30-Rounds Material: Polymer Color: Black Available At: GrabAGun