$277.20
Availability: In Stock
The CMMG Barrel and Bolt Group Kit in .22LR is your shortcut to a dedicated rimfire upper without building from scratch. If you've got an AR platform lower sitting around and want to add a .22LR conversion upper, this kit gives you the two core components—barrel and bolt—that make it happen. It's a smart move for shooters who want to train affordably, shoot suppressed, or just keep lead downrange without emptying the wallet on centerfire ammo.
Built on 4140 chrome moly steel and finished with salt bath nitride inside and out, the 9-inch barrel is designed for reliability in a compact package. The 1:16 twist rate is optimized for .22LR, and the sporting chamber keeps things practical for standard rimfire ammo. The threaded 1/2-28 muzzle gives you options for suppressors, flash hiders, or other muzzle devices if you want to dress it up.
One thing to know upfront: CMMG recommends pairing this kit with a round-style hammer on your lower—notched hammers can cause reliability hiccups with rimfire. Also, 36-grain plated nose ammunition has proven most reliable in testing. Get those details right, and you've got a straightforward path to a functional .22LR upper that won't break the bank or your workflow.
| Caliber | .22LR |
| Barrel Length | 9 inches |
| Material | 4140 Chrome Moly |
| Finish | Salt Bath Nitride (inside and out) |
| Twist Rate | 1:16 |
| Chamber | .22LR Sporting |
| Muzzle Thread | 1/2-28 |
| Kit Contents | Barrel and Bolt Group |
Yes, this barrel and bolt group kit is designed to convert an AR upper to .22LR. Keep in mind that CMMG recommends using a round-style hammer on your lower; notched hammers can cause function issues with rimfire.
CMMG has tested and recommends 36-grain plated nose .22LR ammunition for optimal reliability and function in this kit.
The barrel features a 1/2-28 threaded muzzle, so yes—you can mount a compatible .22LR suppressor or other muzzle device designed for that thread pitch.
The kit includes the barrel and bolt group. You'll need to assemble it into an upper receiver and pair it with an AR lower to complete a functional rifle.
SKU: 167523368 • Width: 1.75in • Height: 1.75in • Depth: 15.25in • Weight: 1.81oz
Availability: In Stock
The CMMG Barrel and Bolt Group Kit in .22LR is your shortcut to a dedicated rimfire upper without building from scratch. If you've got an AR platform lower sitting around and want to add a .22LR conversion upper, this kit gives you the two core components—barrel and bolt—that make it happen. It's a smart move for shooters who want to train affordably, shoot suppressed, or just keep lead downrange without emptying the wallet on centerfire ammo.
Built on 4140 chrome moly steel and finished with salt bath nitride inside and out, the 9-inch barrel is designed for reliability in a compact package. The 1:16 twist rate is optimized for .22LR, and the sporting chamber keeps things practical for standard rimfire ammo. The threaded 1/2-28 muzzle gives you options for suppressors, flash hiders, or other muzzle devices if you want to dress it up.
One thing to know upfront: CMMG recommends pairing this kit with a round-style hammer on your lower—notched hammers can cause reliability hiccups with rimfire. Also, 36-grain plated nose ammunition has proven most reliable in testing. Get those details right, and you've got a straightforward path to a functional .22LR upper that won't break the bank or your workflow.
| Caliber | .22LR |
| Barrel Length | 9 inches |
| Material | 4140 Chrome Moly |
| Finish | Salt Bath Nitride (inside and out) |
| Twist Rate | 1:16 |
| Chamber | .22LR Sporting |
| Muzzle Thread | 1/2-28 |
| Kit Contents | Barrel and Bolt Group |
Yes, this barrel and bolt group kit is designed to convert an AR upper to .22LR. Keep in mind that CMMG recommends using a round-style hammer on your lower; notched hammers can cause function issues with rimfire.
CMMG has tested and recommends 36-grain plated nose .22LR ammunition for optimal reliability and function in this kit.
The barrel features a 1/2-28 threaded muzzle, so yes—you can mount a compatible .22LR suppressor or other muzzle device designed for that thread pitch.
The kit includes the barrel and bolt group. You'll need to assemble it into an upper receiver and pair it with an AR lower to complete a functional rifle.
SKU: 167523368 • Width: 1.75in • Height: 1.75in • Depth: 15.25in • Weight: 1.81oz