*It is not compatible with the new HELLCAT OSP. Fits directly to the Springfield XDM XD-M OSP system with the #1 mount (springfield sku XD5071) that comes with OSP without the need to remove the rear sight.*Promotes rapid target acquisition while providing a precise point of aim; getting shots in range and on target quickly.*New advanced battery technology provides up to 2000 hours on bright setting and up to 30K hours on low setting with one 1632 batteryDoes NOT fit the new HELLCAT OSP. Fits Springfield XD-M OSP pistol. Springfield XD-M OSP comes with 3 mounting plates for different optics, such as for Vortex Venom, RMR. This optics fits the #1 plate.