Aimfiree Tactical 30mm Offset Clamp Scope Rings Mounts 20mm Picatinny Weaver Rail Mount 30mm scope ring. Designed to be compatible with all Weaver/Picatinny style rails. Made of solid aluminum alloy to withstand shock and recoil. Material: aluminum alloy. 45 degree angle design for attachment of lasers, flashlights, R/G dot sights, scope QD thumb Nut, quickly mounted and released.