It's always fun to shoot an SA-22 because they are so darn accurate and reliable. But sometimes a scope would be handy, especially for small game and varmints. With this base you can convert yours over in just a few minutes. The Browning SA-22 Scope Base is a one-piece solid steel alloy scope base. Put a scope on your John M. Browning original. It mounts with a cantilever on the barrel itself. Only compatible with Browning rimfire rings.