multibarrel

/ˌmʌltiˈbɛrəl/
adjective
  1. Having more than one barrel, especially referring to a firearm or a cannon.
    • Hunters sometimes use a multibarrel shotgun for a wider spread of shot.
    • The soldier carried a multibarrel weapon that could fire several rounds quickly.
    • The museum displayed an antique multibarrel gun used on old warships.