The Equinox is the balance between day and night. The P220 Equinox Full-Size is a .45ACP designed by SIG SAUER Custom Shop master gunsmiths. It features a two-tone accented Nitron stainless steel slide with a lightweight black hard-anodized alloy frame. The contrast in color is achieved by the brush polished flats of the slide and nickel accents. The combination of the TRUGLO Tritium Fiber Optic front sight and the rear SIGLITE night sight provides excellent target acquisition, whether shooting day or night. To further enhance the low-light use, the Equinox comes equipped with an accessory rail.