Set Your Sights On Victory. Principally designed to save valuable time during 3-Gun competitions, Dueck Defense Original Rapid Transition Sights (RTS) are invaluable additions to any rail-equipped rifle. They were developed by top 3-Gun shooter Barry Dueck to provide shooters with the most efficient transition between long-range and close-range shots. RTS mount directly to a weapon's Picatinny rail in a unique 45-degree offset position that makes transitioning from a magnified optical sight to iron sights a simple matter of canting your wrists and locking onto the target. No removing a hand from the weapon. No manual adjustments. No cluttered field of vision and no front sight blocking or casting a shadow on the optical sight. Just smooth, quick transitions to help you win a competition or — more importantly — any gunfight.