The FMK G3 has an optic-ready slide that does not require mounting plates! The custom-designed slide allows mounting any Burris Fastfire 3, Vortex Viper, Vortex Venom, or Trijicon RMR optics. Each FMK9C1-G3 comes with a polished stainless steel barrel, redesigned metal slide stop, and Fast Action trigger mechanism for the shooting enthusiast who prefers a quick short trigger pull with a drop-free magazine