Shooter

A shooter can be:

Rock group formed in Sydney in 1979. Played live all over Sydney as well as tours to Canberra and Melbourne.
A type of video game. See shoot 'em up or shooter game.
One of several types of alcoholic beverages intended to be drunk as "a shot" (a measure of volume approximately equal to one ounce).
A 1988 made-for-TV movie. See Shooter (movie).
a book by USMC Sgt. Jack Coughlin about his experiences as a sniper in Iraq.
A slang term for a firearm, especially a handgun.
In marbles, a marble of 3/4" diameter, propelled by a player to strike another marble.
A person who takes part in the sport or act of shooting.