LASERLYTE Rear Sight Laser for all Springfield Armory XDs. LASER DOT for fast aim. FITS in all holsters due to low profile design. ACTIVATE the laser with either hand when you grab the gun. A REAR SIGHT on your gun and LASER SIGHT when you want it. FITS: All Springfield Armory SA XD XDS XDE XDM 9 MM 40 SW (not 5.25 model) LASER GUN SIGHT: When mounted adjust the laser to bullet impact. Use the laser to quickly aim at your target. Use the laser to rapidly aim after the gun recoils. Use the laser to teach new or challenged shooters. LOW PROFILE: this patented rear sight design allows once mounted will fit into any holster. The rear iron sights are always ready to be used. When the lowlight situation arises then activate the laser for accurate shooting LASER MODES: the laser is programmable to a constant laser dot or to a flashing dot. The user can customize the system to either dot. This gun sight is the brightest and most powerful laser we are legally allowed to produce. The bright laser dot can be seen over 100 yards away at night. Power Output: 630 - 670nm, &lt; 5mW, Class: IIIa