CMMG Echo Conversion Kit for AR-Style 22LR Rifles - 22BA64E
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CMMG Echo Conversion Kit for AR-Style 22LR Rifles - 22BA64E, Just swap this drop in conversion with the bolt carrier group from your 5.56/223 chambered rifle and you will be ready to shoot 22LR. Ships with 25rd 22LR magazine. 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.