Browning 800 Express air pistol Breakbarrel Single-shot Anti-recoil power system Magnum velocity Fiber optic sights (adj. rear) Ergonomic & ambidextrous Textured synthetic grip with finger grooves Automatic safety Grooved receiver Includes cocking aid In the Airgun Reporter video for the Browning 800 Mag pistol - the version prior to the Browning 800 Express release, Paul Capello shows a dot sight on the gun. That sight comes with a Weaver mount. This pistol does not have a Weaver base...it has an 11mm base. To mount that sight or any Weaver accessory, mount an 11mm-to-Weaver adapter on this gun's 11mm scope grooves. We have 2 listed on the ACCESSORIES link on this page. Then, you can select Weaver-based dot sights, which are also shown on the ACCESSORIES link.