RFX25 1X20 MICRO GREEN DOT REFLEX SIGHT The Docter mounting system is a standardized mounting footprint, it is less popular as a factory option than most others, but still commonly used. FEATURES: 3 MOA Green Dot 20x28 mm viewing window Docter footprint & Picatinny mount included Auto shut off and INSTANT-ONA(R) technology Lightweight 6061-T6 aluminum body Designed from the ground up to ensure clarity, solid function, and rapid target acquisition Fits most compact and full-size, optics-ready pistols, that use the Docter mounting footprint With 2-night vision brightness settings, the RFX25 is the perfect optic for your pistol Mfg: Viridian