The Weight of most all Game Reaper 2 mounts are 2 to 3 ounces. Depends on height style and size. Material is 6061T6 Aluminum. For Browning A-Bolt 3 Savage All Round Savage Axis.Browning A Bolt 3 mounts are machined to accommodate 8-40 base screws. Some Savage Round Receiver Guns and Savage Axis Guns are drilled and tapped with 8-40 base screw holes and will fit the Browning A-Bolt 3 Game Reaper 2 piece mount. Please check your gun to make sure what size holes are in the receiver before you order.Base screws are 8-40 x 1/4a ^2 long and use a 9/64 Allen wrench. Ring screws are 6-40 x 5/8a ^2 long and use a 7/64 Allen wrench. All Game Reaper 2 piece 30mm mounts are tactical meaning that the number of ring screws are 4 on each end of the mount.Tactical rings are .80a ^2 wide.These will accommodate left or right handed and short or long action guns.Height of mounts from top of receiver to centerline of scope tube is - low .94a ^2 medium 1.06a ^2 and High 1.19a ^2. 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 receiver No moving parts between the firearm and the scope 67% 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 Made in the USA