Michael, Midwest Industries have a great Ruger Charger chassis that you can then put an SB Tactical brace directly to the pistol.----------MidwestIndustriesinc.com . Copper Customs Gun Shop out of Indiana also has a direct brace adapter. See link----https://coppercustom.com/copper-custom-ruger-22-charger-ar-pistol-brace-adapter. This is Mac at Military Arms Channel. If you go to the Tube and search Military Arms Channel and search the Charger pistol brace adapter you'll see vid and how to get one for $55.-----------youtube.com/watch?v=RoC8Q40NVRY

you can use a adapter or here is a full chassis kit preppergunshop.com/sb-tactical-arm-brace-sb-ruger-charger-td-sba3-kit

Michael, I have not yet seen a direct fit brace Sir. One of the most popular options is the adjustable sba3 arm brace w/adapter (Copper Custom adapter allows for a wide choice of braces) -- https://coppercustom.com/copper-custom-ruger-22-charger-ar-pistol-brace-adapter ------------------ youtube.com/watch?v=WeylQ5ZVCpQ