Browning 12389 Two-Piece Scope Base Aluminum Black Matte for Browning T-Bolt

These Browning-style scope bases are designed specifically for use on Browning T-Bolt rifles along with matching Browning-style rimfire scope rings. hey are machined from solid steel with a special double shoulder design that holds rings securely, even under heavy use. Made to fit Browning-style rimfire scope rings only. Fits t-Bolt Rifles only. (22Lr and 17 HMR)