The American Defense AD-170-VPG is a quick-release picatinny-style rail adaptor featuring a 3-lug rail. Constructed of durable 6061 T6 Aluminum and finished with a T3 Mil-spec anodizing. The QD Auto Lock lever system adjusts to accommodate in-spec and out-of-spec rails. Mount base will accept all VPG bolt-on rails (3-lug and 5-lug). The rail adaptor allows users to add a quick detach lever mounts to standard bolt on accessories.