SIG SAUER ROMEOZERO-PRO OPEN REFLEX SIGHT This full-size reflex optic features large 30mm aspherical lens made of scratch-resistant glass, offering unmatched clarity and distortion-free sight picture. The ROMEOZero-PRO pistol sight features a proprietary carbon-infused polymer housing with reinforced lens protection area making it incredibly durable while delivering significant drop and impact protection. It incorporates hardened steel protective shroud for even greater protection and durability. TECHNOLOGIES: ALT - Precision molded aspheric lens technology virtually eliminates aberration, reduces weight, and helps focus the projected image through lenses for superior low distortion optical performance. LensArmor - Abrasion-resistant lens coatings for extreme durability ensure the lenses on your scope will stay sharp, bright, and clear. Motac - Activated through motion sensing technology, MOTAC immediately powers up illumination when it senses motion and powers down when it does not in order to extend battery life. SpectraCoat - Highly efficient, ultra-wide broadband, anti-reflection lens coatings reduce surface reflections to extremely low levels across the entire visible spectrum providing superior light transmission. Truhold - Lockless zeroing system utilizes twin adjustment springs designed and torture tested to endure handgun recoil and return to zero shot after shot. T.A.P - Touch-Activated Programming and Button-Activated Brightness / Reticle Selection Modes