Introducing the CMMG AR-15 4.5" Barrel & Bolt Group Kit, designed with precision engineering and high-quality materials. This kit features a medium contour 4140 Chrome Moly barrel with a salt bath nitride finish, ensuring durability and optimal performance. Ideal for converting your upper to a dedicated .22LR, this kit is perfect for range time and training sessions. CMMG is renowned for its innovation and commitment to quality.

Key Features:
- Manufacturer: CMMG
- Model: AR-15 4.5" Barrel & Bolt Group Kit
- Caliber: .22 LR
- Barrel Length: 4.5"
- Barrel Twist: 1:16
- Finish: Salt Bath Nitride
- Muzzle Thread: 1/2-28
- Weight: 2 lbs
- Material: 4140 Chrome Moly