The Primary Arms SLx Flip-To-Side Magnifier Mount utilizes a direct bolt system interface with the magnifier instead of a traditional ring design in order to save weight, increase strength, and eliminate the possibility of the magnifier slipping or twisting. The SLx Flip-To-Side Magnifier Mount features a low profile design with two steel alloy crossbolts that ensure a rock solid mount.Features6061-T6 aluminum constructionHardcoat anodized finish Standard 1.41" optical centerlineIncludes spacers for 1.535" and 1.64" heightsCompatible with direct bolt-on style magnifiersDual crossbolts made from steel alloyLow profile and lightweight design