The CMMG 10-Shot Echo .22LR AR Conversion Kit (CMMG part no. 22BA6B3) drops into a compatible AR-15 lower to convert it to .22LR rimfire fire, built around a full-body stainless steel magazine holding 10 rounds. CMMG’s Echo lineup is designed as a semi-auto-only conversion, giving shooters an affordable way to run more rounds downrange without centerfire ammunition costs or recoil. CMMG notes that a notched hammer will cause function issues with this conversion, so best results come from using a rounded-style hammer in the host lower. It’s a solid pickup for AR owners who want a straightforward rimfire training or plinking option and are running a compatible standard hammer.

Key Specifications

• Converts a compatible AR-15 to .22LR rimfire.
• Includes a full-body stainless steel 10-round magazine.
• Built as a semi-auto-only conversion.

Frequently Asked Questions

How many rounds does the included magazine hold? It’s a full-body stainless steel magazine holding 10 rounds.

Are there compatibility notes for this kit? Yes, CMMG notes a notched hammer will cause function issues, so a rounded-style hammer is recommended for best results.

Buy the CMMG 10-Shot Echo .22LR AR Conversion Kit

Add an affordable rimfire training option to a compatible AR-15 lower. Browse our full AR bolt carrier groups selection and order from our Lubbock, Texas gun shop for fast, direct shipping.