The Badger Ordnance Coaxial Laser Range Finder 30mm Mount provides a stable platform for attaching a Picatinny rail mounted range finder on your rifle's scope. The Coaxial Laser Range Finder 30mm Mount bolts onto the bottom scope ring. The range finder will be positioned at the optimum height for easy reading, yet it won't interfere with the scope objective lens. Fits 4-screw 30mm Badger rings & UniMounts only (screw holes are on .355" centers) 9-slot Picatinny rail Positions rail approx. 1.325" above tube Machined from strong, lightweight 6061 T6 aluminum Matte black military Type III hardcoat anodized finish The Badger Ordn Mfg: Badger Ordnance