Strong, lightweight aluminum mounts provide a secure, solid platform for Trijicon’s RMR red dot sights. RM34 offers Picatinny rail mounting with extra elevation; attaches to rail with a full-length locking bar and an easy-to-grasp, grooved, thumbscrew for fast attachment. Mount behind your primary optic for fast transition from a magnified view to close-in sighting by rotating the rifle slightly. Locking bar and easy-to-grasp grooved thumbscrew ensure fast attachment. Mfg: Trijicon SPECS: Aluminum, hardcoat anodized matte black. Heights measured from top of rail to bottom of sight. Fits Picatinny rails. RM34 – 7/8" (2.2cm) high.