SIG Sauer is world-famous for its high-quality firearms, but now you can install one of their optics to your firearm as well. The SIG Sauer Romeo4 Red Dot Optic is a parallax Free, unlimited eye relief, quick target acquisition optic. The Romeo4 features the MOTAC or Motion Activated Illumination system that powers up when it senses motion and powers down when it does not. This provides for optimum operational safety and enhanced battery life. The housing is made from extremely strong and lightweight aircraft-grade aluminum which will allow for years of reliable service. The Romeo4 features a dependable IPX-7 waterproof and fog-proof performance.