The SIG Sauer ROMEO Zero red dot sight features an ultra-compact, lightweight, and durable design optimized for compact and sub compact concealed carry pistols. Unlike other pistol red dot sights, the ROMEO Zero is fully made from reinforced polymer including the lens which has been teste to withstand up to 10 times the impact force that a traditional glass lens can withstand. It features a highly efficient LED emitter that is 8 times more efficient than other red dots and can last up to 10 years on a single CR1632 battery. Additionally, the MOTAC motion activated system will turn off the 6 MOA red dot when sitting still and will automatically turn on the moment your pistol begins to move. An integrated rear sight is compatible with the standard front sight on the SIG P365 handguns allowing you to use your iron sights as an indexing point to quickly find the red dot. Additionally, it comes with an aluminum shield for protection from impacts.