Designed for fast, responsive target acquisition and accuracy, the ROMEO1 PRO miniature open-reflex red dot sight was engineered to withstand the punishment of harsh environments. With an upgraded emitter for superior brightness and outstanding battery life, the ROMEO1 PRO is capable of mounting to any Sig Sauer pistol or any other pistol machined to accept the ROMEO2/PRO reflex sight interface and mounting hole spacing using the included M4 mounting screws.Features:Molded glass aspheric lens with high-performance coatings for superior light transmittance and zero distortion3 or 6 MOA red dot with multiple brightness settings for rapid target engagement under a full range of lighting conditionsTruHold Lockless Zeroing System that utilizes twin adjustment springs designed to endure handgun recoil and return to zero shot after shotNew point-source emitter provides exceptional brightness with 12 settings (10 Daytime/2 NV), and 20,000+ hours of runtimeMOTAC (Motion Activated Illuminatio...