Browning X-Bolt II Scope Base Features The Browning X-Bolt II Scope Base is machined from aircraft grade alloy and built as a one-piece design that accepts Picatinny or Mil-Std 1913 rings for a secure optic mounting platform. The four-screw pre-base mounting system spreads clamping force evenly across the receiver for a stable long-lasting fit. Built-in 20 MOA of elevation gives long-range shooters additional adjustment range in their scope s turrets which is especially valuable when shooting magnum calibers like .300 RUM and .300 PRC at extended distances. This base is compatible with all long action X-Bolt and X-Bolt 2 rifles including magnum chamberings. Browning finishes this scope base in a matte black finish that matches factory rifle finishes while resisting wear from repeated mounting and dismounting of optics. Mounting screws for X-Bolt and X-Bolt 2 rifles ship included simplifying installation for owners upgrading their optic setup. The Picatinny-style design is also generally compatible with Weaver-style rings giving shooters flexibility in ring selection. Browning built this base specifically for X-Bolt owners who want a dependable long-range capable mounting platform for their rifle s optic. Browning X-Bolt II Scope Base Specifications Brand: Browning Fits: X-Bolt / X-Bolt II Long Action Style: One Piece Picatinny MOA: 20 MOA Finish: Matte Black Material: Steel Ring Compatibility: Picatinny / Weaver Style Available At: GrabAGun