CMMG Gen 2 Mk4 22LR 25rd Black - AR-15 Magazine

Run .22 LR in your AR-15 without compromising on fit or feed reliability. The CMMG Gen 2 Mk4 22LR Magazine delivers a 25-round capacity in a polymer body engineered to match the exterior styling of CMMG's rifle and conversion magazine lineup — so it looks like it belongs, because it was designed to.

The CMMG Gen 2 Mk4 22LR Magazine is a 25-round polymer magazine designed for use with .22 LR conversion kits and CMMG Mk4/mil-spec AR-15 lower receivers, featuring updated Gen 2 exterior styling in a black finish.

Three updates in the Gen 2 design make this a meaningful upgrade over first-generation 22ARC magazines. The refined exterior profile matches the visual language of CMMG's current firearm and conversion magazine lineup, giving your .22 LR setup a cohesive, purpose-built appearance rather than an afterthought. Proven internal geometry from the original 22ARC magazine carries forward, maintaining the reliable feeding and ejection that made CMMG's 22 LR conversion system a popular choice for cost-effective training. The 25-round capacity provides more trigger time between reloads for drills, training, and plinking sessions.

Compatible with CMMG .22 LR conversion kits and CMMG Mk4/mil-spec AR-15 lower receivers. Not compatible with standard 5.56 upper assemblies without a .22 LR conversion kit.

Polymer construction. 25-round capacity. Black finish.

Suited for cost-effective training with a .22 LR conversion kit, small-game applications, new shooter instruction, and extended range sessions where reduced ammunition cost matters.

By CMMG. Standard CMMG warranty applies.