This is a colored and printer friendly version of this model by Icarus3D.
https://www.printables.com/model/230053-leon-skennedys-original-pistol-from-resident-evil-
while printing, you may find that the cord connecting the laser sight to the battery pack doesn't print well. However it has the exact same diameter of normal filament. Make sure to cleanly snip both ends of the cord off, and then bend and glue a length of filament in it's place.