The SIG SAUER ROMEO-X Enclosed is a sealed-emitter pistol red dot built for duty and everyday carry. The fully enclosed emitter keeps lint, dust, rain, and snow out of the optical path so your dot stays clear when it matters. Key Features 6 MOA red dot - fast, easy-to-find aiming point for close-range speed Fully enclosed, sealed 7075 aluminum emitter for maximum reliability in adverse conditions MOTAC (Motion Activated Illumination) wakes the dot on movement and sleeps it at rest - up to 20,000 hours of runtime Side-loading CR1632 battery tray - swap the battery without removing the optic or losing zero 15 daylight-bright illumination settings with a distortion-free aspherical lens Low deck height supports iron-sight co-witness; waterproof and shock-resistant Fitment ROMEO-X Compact footprint - the Shield RMSc pattern used by slim, optics-ready carry pistols such as the SIG P365 family, Springfield Hellcat OSP, Smith & Wesson Shield Plus OR, and Glock 43X / 48 MOS. GLOCK is a registered trademark of GLOCK Inc. 3CR Tactical is not affiliated with, endorsed by, or sponsored by GLOCK Inc. Any reference to GLOCK products is for identification and compatibility purposes only.