The CMMG Barrel and Bolt Group Kit is a .22 LR conversion kit that drops into an existing AR-15 upper, pairing a matched 9-inch barrel with a dedicated bolt group so all you need to add is a magazine (CMMG part no. 22D8FEF).

Key Specifications

• Chambered in .22 LR
• 9-inch barrel length
• Converts an existing AR-15 upper to dedicated .22 LR
• Includes matched barrel and bolt group
• CMMG recommends a round-style hammer; notched hammers can cause function issues
• 36-grain plated-nose bullets are CMMG’s recommended choice for reliable function

Frequently Asked Questions

What else do I need to run this kit? Just a compatible .22 LR magazine; the kit itself supplies the matched barrel and bolt group.

Does the barrel length change what my rifle is legally configured as? This is a bare barrel/bolt kit with no lower included; if your upper is normally rifle-length, dropping in a 9-inch barrel on a rifle-configured lower can create a length-of-pull or NFA concern, so confirm your complete build’s overall configuration meets ATF barrel-length rules before assembly.

Does CMMG recommend a specific hammer or ammo for reliable function? Yes, they recommend a round-style hammer (notched hammers can cause function issues) and 36-grain plated-nose bullets for the best function.

Buy the CMMG .22 LR Barrel and Bolt Group Conversion Kit, 9-Inch

Order the CMMG .22 LR Barrel and Bolt Group Conversion Kit, 9-Inch from a Lubbock, TX gun shop. Shop more CMMG parts or browse the AR15 Barrels category at Schaefer Defense.