A detachable, rectangular laser module mounted to a firearm which projects a colored beam onto the target, improving the shooter's accuracy. Also see [[laser pointer projection]], which can be used when the beam and/or dot are visible. 

Not to be confused with [[laser pointer]], a small cylindrical tool used to direct attention to one spot during meetings and lectures.

Also please don't confuse with [[eye beam]], where lasers may shoot from a character's eyes.