CMMG Rimfire Barrel, Bolt Kit AR-15 M4 Contour 22 Long Rifle 16" Barrel
CMMG Rimfire Barrel, Bolt Kit AR-15 M4 Contour 22 Long Rifle 16" Barrel, Everything you need to convert your existing upper to a dedicated.22lr.Just purchase a magazine and you are ready to go.For best performance use a round style hammer as notched hammers can cause function issues and 36 grain plated nose bullets have proven to be the best choice for function.Length: 16.10"Model: Replacement BarrelTwist: 1:16"Finish: Salt Bath Nitride