Optimized for 1.4" tall adjusters, the Trijicon Picatinny Rail is designed to mount on accessory ring caps that are used for Q-LOC style mounts. The rail can be set at the 12 o'clock position or either 45° position depending on the accessory being mounted. It's designed to work with Trijicon Q-LOC and Slim Line style variable power mounts and accessory ring caps to create a full optics solution in one system.