Hi-Lux Optics Riser Block Matte Black. The Leatherwood Max-Tac Riser Block is designed to raise the bigger scope objective approximately 1/2" higher from the Picatinny Rail Flat Tops. The Leatherwood High Grade Aluminum Riser Block and other Leatherwood aluminum rings and bases are made up of high grade aircraft aluminum alloy. The riser block is designed to raise the larger scope objective lens about 1/2" above the Picatinny/Weaver rail. This riser can be used on any picatinny or weaver rail. Specifications for Hi-Lux Optics Riser Block: Manufacturer: Hi-Lux Optics Color: Black Finish: Matte Fabric/Material: Aluminum Red Dot Sights-Footprint: Not Applicable Optic Cut: Not Applicable Weight: 1.6 oz Ring Height: 0.5 in Features of Hi-Lux Optics MAX-TAC High Grade Aluminum Riser Block 1/2in in height; mounts onto picatinny Package Contents: Hi-Lux Optics Riser Block Allen Wrench Hi-Lux Optics LW-RB: Riser Block Matte Black