USED DNZ Products Game Reaper Scope Mount - Browning Bar/ BLR High Ring 30 mm Tube Black Matte. Both use 7/64 Allen wrench. Outside to outside of rings is 4.29 . Rings are .63 wide. 4 Hole to hole spacing dimensions are .50 2.81 .50 . Height of mounts from top of receiver to centerline of scope tube is high 1.19 . Mount fits both left and right hand firearms. Specifications for DNZ Products Browning BLR - Short Action 30mm High Mount: Manufacturer: DNZ Products Fabric/Material: 6061-T6 Aluminum Gun Make: Browning Color: Black Tube Diameter: 30 mm Ring Height: High Gun Model: Browning BLR Browning BAR Additional Features: Short Action Action Length: Short Action Condition: New Quantity: 1 Finish: Matte Features of DNZ Products Browning BLR - Short Action 30mm High Mount: Precision machined from a solid block of top-grade billet 6061T6 aluminum Custom made to fit each type of firearm and align perfectly with your rifle's receiver No moving parts between the firearm and the scope 67percent lighter than comparable one-piece mounts with four times the threads and precision socket-head cap screws for absolute strength and security Absorbs shock and withstands temperature extremes better than steel mounts at a fraction of the weight Package Contents: DNZ Products Browning BLR - Short Action 30mm High Mount What firearm models does the manufacturer say DNZ Products Browning BLR - Short Action 30mm High Mount is compatible with? The manufacturer suggests that DNZ Products Browning BLR - Short Action 30mm High Mount is compatible with Browning BAR Browning BLRDNZ Products 49530H: Browning BLR-Short Action-High Mount-Black