CMMG offers a conversion kit capable of running .22 Long Rifle cartridges in .223 Rem.-chambered AR-15-style rifles. The kit utilizes a stainless steel bolt carrier group and one polymer AR-15 ...

For more information on these CMMG 5.7 Conversion Kits, visit cmmginc.com. In this article Editor’s Choice , CMMG 5.7 mm Conversion Kit , CMMG , 5.7 mm , AR-15 , Evan Brune ...

Ciener, CMMG, Stag Arms and Target Master are a few companies that offer .22lr conversion kits. I prefer to purchase from a company that actually builds AR-15s , so I chose the CMMG.