Lion Gears Tactical Picatinny .5in Riser 1.45in Long with 3 Slots Built-in Swivel Mounting Base. 5in Riser: Manufacturer: Lion Gears Color: Black Included Accessories: Tactical Picatinny Weapon Mount with 3 Slots Length: 1.45 in Gun Rail: Picatinny Features of Lion Gears Tactical Picatinny Weapon Mounts System Oriented Design with Under Bridge Cavity for Concealed Lion Gears Low Profile Angle Mounts - Build a Flexible and Compact Bridge Mount System Robust Compact Steel Locking Plate & Screws - No Bulky Screws and Knobs Threaded into Steel not Aluminum Where Troubles Bound to Happen Material Aircraft Aluminum Rail Type Picatinny/Weaver Finish Black Matte For items with Sling Swivels: Enable Sling Swivel to Mount on Any Picatinny Rail Swivel Stud Constructed with Black-Finished High-Strength Steel ? High 3 Slots BridgeMount Base Can Also Be Used As a Riser Separately Package Contents: Lion Gears Tactical Picatinny Weapon Mounts Lion Gears LG-BM0305QD: Tactical Picatinny .5in Riser 1.45in Long with 3 Slots Built-in Swivel Mounting Base