Long UTG Super-Slim Picatinny riser that adds 0.5 inch of height across a 13-slot, 5.5-inch footprint. The extended length suits optics or accessories that need a longer mounting surface, and locking hardware holds zero through recoil. Features: 0.5-inch riser height 13 slots, 5.5-inch length Fits 20mm Picatinny and Weaver rails 6061-T6 aluminum, matte black anodized Locking Torx screws with square recoil stops for zero hold Can be joined side-by-side for a wider platform About 2.68 oz; includes T20 Torx wrench Use it to raise and extend an optic or accessory on a flat-top Picatinny rail.