CMMG 22LR Bravo Conversion Kit With 10 Round Magazine - 22BA62F The CMMG Drop In .22 LR Conversion Kit is what you need to turn your rifle into a plinking machine. This conversion kit converts into a .22 Long Rifle, allowing you to practice without spending a fortune at the range. The magazine holds 10 rounds of ammo. 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.