BASICS:
Type        : Laser sight
Usage       : Increases accuracy on many weapons.

TACTICAL/COMMENTS: 
The laser sight makes your weapons more accurate. The red dot is merely cosmetic, so do NOT use it to aim. Not all weapons can be equipped with a laser sight.
 
AS SEEN IN:
Leon, The Terminator (possibly the first ever movie use), Lethal Weapon 4 and Ghost Dog all feature laser sights.