*The fastest, most accurate, ultra-compact micro reflex sight - the ROMEOZero has been optimized for everyday concealed carry and guns with slim slide profiles*The sight features a ruggedized, textured polymer body and the SpectraCoat HD Polymer lens system with 10 times the impact resistance over traditional glass lenses*MOTAC (Motion Activated Illumination System) that powers up when it senses motion and powers down when it does not; Parallax freethis product is not compatible with slides cut to accept a standard ROMEO1. ROMEOZero is Compatible With: - Direct mount to ROMEOZero - Shield RMS-c footprint - J-Point footprint. SIG Sauer assumes no liability if a user attempts to mount a ROMEOZero to a Springfield Hellcat pistol slide.