Lion Gears 12 Slots 0.75" Tactical Slim Cantilever Riser BM1207EX Tactical Low Profile Slim Picatinny Cantilever Riser Mount 0.75" High, 5" Long with 12 Slots. Rock Solid Slim Design with Steel to Steel Locking Connection. Not Threading into Aluminum where Trouble Bounds to Happen. No Bulky Screw! BridgeMount(r) Modular Design with under bridge space for additional accessories! Build Your Own Double or Triple Rails System Light Weight, only 2.3oz