SECTION XIX - ARMS AND AMMUNITION; PARTS AND ACCESSORIES THEREOF > CHAPTER 93 - ARMS AND AMMUNITION; PARTS AND ACCESSORIES THEREOF > 9303 Other firearms and similar devices which operate by the firing of an explosive charge (for example, sporting shotguns and rifles, muzzle-loading firearms, Very pistols and other devices designed to project only signal flares, pistols and revolvers for firing blank ammunition, captive-bolt humane killers, line-throwing guns) > Other sporting, hunting or target-shooting shotguns, including combination shotgun-rifles > Single-barrelled, smooth bore