Browning Mount XBOLT XLOCK Gloss .400 Standard Height Integration means stability. Browning’s Integrated Scope Mount System unitizes the ring and base into a single ultra-rigid unit. Machined from 7000 series aluminum alloy they eliminate alignment problems and the possibility of a loose connection between the base and ring. They are available in .400 Standard height .500 Intermediate height and .600 High height versions to fit your needs. - Material: Alloy - Color: Black - Pockets: Gloss - Mount Pieces: Two Piece - Ring Diameter: 1 inch - Ring Height: Standard - Screw Quantity: 8 - Bases Screws: 0.25 - Ring Screws: 0.375 - Weight: 6.4 oz