MasterPiece Arms BA Bolt Action Mount Features The MasterPiece Arms BA Bolt Action Mount is precision machined from 6061 T6 aluminum giving it extreme bore size consistency within plus or minus 0.0002 inches for roundness and cylindricity. The Picatinny rail interface ensures positive engagement with both in spec and out of spec rail systems which means the mount seats securely across a range of receivers. Four mounting locations on the left and right side front and back are spaced on 20mm centers so the mount works with other Unimount accessories already on hand. This design gives shooters the confidence to move an optic between multiple rifles while needing only simple windage and elevation adjustments. At 4.76 inches in length and 6.8 ounces the mount is light enough not to burden a precision rifle build while remaining rigid under recoil. Its superior clamping surface maximizes rail engagement and the 1.125 inch height accommodates objectives up to 50mm on this 30mm mount. The hard coat T3 Mil-Spec anodized finish in black resists wear from field use and repeated mounting and remounting. Backed by a lifetime warranty this mount is built for shooters who expect their optic to return to zero every time it goes back on the rifle. MasterPiece Arms BA Bolt Action Mount Specifications Manufacturer: MasterPiece Arms Model: BA Bolt Action Mount Type: Picatinny Rail Color: Black Material: Aluminum Finish: Anodized Tube Diameter: 30mm Mount Height: 1.125 MOA: 0 Length: 4.76 Weight: 6.8 oz Rings Included: Yes Warranty: Mfg Limited Lifetime Available At: GrabAGun