CMMG builds this conversion magazine (part no. 22AFC2B) to run with .22 LR conversion kits installed in CMMG Mk4 or mil-spec AR-15 lower receivers. It is not a standalone magazine for a dedicated .22 LR rifle — it’s designed specifically to feed a converted AR-15 lower running rimfire ammunition through a .22LR conversion bolt/kit, holding 25 rounds in a black polymer body. For CMMG owners running a .22LR conversion kit, this AR magazine keeps rimfire range days affordable.

Key Specifications

• Chambered in .22 LR.
• Holds 25 rounds.
• Compatible with CMMG Mk4/mil-spec AR-15 lower receivers running a .22LR conversion kit.
• Finished in black.
• Designed as a conversion magazine, not for a standalone .22 LR rifle.
• Classified by the manufacturer as a Magazine.
• Weighs approximately 0.42 lb as shipped.
• Measures approximately 9.2 inches in overall length.

Frequently Asked Questions

Does this work in any AR-15? It’s built to feed a CMMG Mk4/mil-spec AR-15 lower that has a .22LR conversion kit installed, not a standard 5.56 upper.

How many rounds does it hold? 25 rounds of .22 LR.

Buy the CMMG 22 LR Conversion 25-Round Magazine

A high-capacity rimfire magazine for a converted AR-15/Mk4 lower, this CMMG magazine makes plinking days more affordable. Order it from our Lubbock, Texas gun shop for fast, insured shipping.