This base works with picatinny style red dot scope

SA-22 PICATINNY BASE for Browning Semi Automatic 22 Rimfire Rifle. Primarily used to mount a picatinny style RED DOT Scope. Overall length is about 4.125 inches. Base extends approximately 2.25 inches past the front screw hole. Comes with torx head screws for mounting to rifle's barrel. The base is NOT reversible and is NOT made to extend over the rifle's receiver (Part P00252731)