The ideal sighting solution for the modern semi-automatic pistol. The ROMEO1PRO brings a new level of durability and performance to the miniature open-reflex red dot sight. Its aircraft grade aluminum housing ensures corrosion resistance under the harshest environments, and a new upgraded point-source emitter provides increased brightness in day or night conditions with 12 brightness settings. The molded glass aspheric lens has upgraded high performance coatings for superior light transmittance and zero distortion giving you fast, responsive target acquisition and accuracy. The ROMEO1PRO includes a ruggedized protective shroud in the box for extreme durability. The ROMEO1 Pro is Compatible with: M17 P320-M17 P320 XFive Legion P320 XCompact P320 XFull All PRO-CUT Slides P320 Pro Series Product Specifications Manufacturer: Sig Sauer Model: Romeo1 PRO Magnification: 1x Adjustment Increments: 1.0 MOA Objective Len Diameter: 30mm Battery: CR1632 Run Time: 20000 Reticle: 3 MOA Red Dot Overall Length: 46.5mm Overall Width: 31.7mm Height: 27.4mm Weight: 1oz Waterproofing: IPX 7 Illumination Settings: 10 Daytime, 2 Night Vision Total Elevation Travel: 100 MOA Total Windage Travel: 100 MOA Finish: Black