Lion Gears Low Profile Tactical Picatinny/Weaver 45 Degree Pro Mount, 2.16" Long with 5 Slots Low Profile Compact 45 Degree Angle Mount, picatinny/weaver rail 2.16" Long with 5 Slots Sufficient Clearance For Both Top and Side Mounting Space; Only 5mm Saddle Height, Perfect to Mount Under Scope or BridgeMount Risers System Oriented Design to Build a Flexible and Compact Bridge Mount Systems when Use with Lion Gear's Bridge Mount Robust Compact Steel Locking Bolt & Steel nut. Threaded into Steel, Not Aluminum, Free of Stripped Threads! Slim Design & Truly Light Weight, No Bulky Screws and Knobs.