This is a holster shell only with spring retention spring. (No release clip, No mounting (due to many different manufactures setup).  Design for the Springfield Armory Sub Compact 3 inch XD with the C5L Viridian laser. Hardware required to mount spring retention spring -  (2) 8-32 screws approx. 3/4" in & 1 1/16" in length (1) ea. and (2) 8/32 self locking nuts. Instant on/off requirement is a strong magnet .510 wide x .110 height decimal inches. (Press fit )