Badger Ordnance's Specialty Mount Adapter is the foundation stone of their convenient system for clamping auxiliary sights or other accessories directly to your optic. The Specialty Mount Adapter goes on the underside of your scope tube - then you choose the "top half" that lets you mount the accessory you want. Simply place a Specialty Mount Adapter on the bottom side of the scope, then bolt the matching top ring in place - Brownells sells these, separately. It's fast and easy. Fits a 34mm scope tube Machined aluminum alloy Matte black mil-spec Type III hardcoat anodized Compatible with 4- OR 6-screw Badger accessory mounts Mfg: Badger Ordnance