CMMG Mk57 22 Conversion Kit with 3 10 Round Steel Black Magazines

***This kit is for converting 5.7x28mm to 22lr on CMMG's 5.7 conversion uppers only and will not work with .223/5.56 chambered rifles or our Mk57 lower*** Easily convert your CMMG 5.7x28mm Upper Receiver Group into a .22LR in seconds! The new Mk57 .22LR Conversion Kit is simple to use. Just remove the existing CMMG bolt carrier group from your 5.7A-28 upper and replace it with the drop-in conversion. Pair the upper with any Mil-Spec AR15/Mk4 lower receiver and then use the included magazine to safely shoot .22LR. It's a great way to get in more trigger time while saving money on ammo. This conversion kit is designed for use with all CMMG Mk57 5.7x28mm upper receiver groups and bolt/barrel combinations when paired with an AR15 Lower.Kit Includes-5.7A-28 to 22lr conversion-Three 10rd Magazines- Stainless Steel Construction- Compatible with all CMMG Mk57 Uppers- Magazine Fits in Mil-Spec AR15/Mk4 lowers- Simple Installation - No Tools RequiredNot compatible with Mk57 Lower Groups or 5.56/.223 uppers.