Excellent addition to any ar-15 rimfire conversion - CMMG Mk4/AR-15 .22 LR 10 Round Rifle Magazine

This CMMG Mk4 .22 LR 10-round magazine is an excellent addition to any AR-15 rimfire conversion setup. The polymer construction feels remarkably durable, and the magazine seats securely into the lower receiver without any wobble. At the range, it performs flawlessly, feeding rounds smoothly and reliably with zero jams or nose-diving issues. However, loading the .22 LR rounds can be incredibly tedious and tough on your thumbs due to the stiff spring tension and lack of a loading assist tab. It is also worth noting that the capacity is restricted to 10 rounds by a simple pin inside a full-size body, which feels a bit like wasted space but keeps it fully compliant. Despite the minor loading frustration, it ensures consistent feeding down to the very last shot, making it a highly reliable choice for affordable target practice in capacity-restricted states.