shotgun

shotgun
shot‧gun /ˈʃɒtɡʌn $ ˈʃɑːt-/ noun [countable]
a long gun fired from the shoulder, that shoots many small round balls at one time, used especially for killing birds or animals:
    The robbers were armed with sawn-off shotguns (=ones that have been made shorter, so the balls go in different directions).