Sightmark Tactical Cantilever Scope Mount features a 34mm tube diameter and 1.50 mount height, making it a standard medium profile option for flat-top receivers on AR platform firearms. Constructed from aircraft-grade 6061-T6 aluminum with a non-reflective matte black finish, this 5.98 long 1-piece base and ring combo interfaces with standard Picatinny rails. It features a 2 forward offset for scopes requiring greater eye relief. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or bases. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.