CS Force Medium Profile Riser Mount 1/2" See Through Picatinny Rail for Scopes and Optics 8 Slots 3.3"(L) x 0.7"(H) Fits AR series/M series and the other Flat Tops; New Gen. riser mount for rifles with Picatinny/Weaver rail Quick release thumb tightening system mounts to a common 20mm rail system Precision machined from aircraft aluminum with matte black anodizing See Through design allows the users to see the iron sights when mounted Length: 84mm(3.31"); Height: 18mm(0.71"); Rise: 1/2"; Weight: 70g