(a) a firearm manufactured before 1 January 1900 for which ammunition is not readily commercially available;
(b) an explosive-powered tool within the meaning of Part IXA of the Regulations under the Scaffolding and Lifts Act, 1912-1948 of the State of New South Wales in its application in the Territory;
(c) a heavy bench mounted rifle used for experimental purposes that is of a kind approved by the Registrar;
(d) a tool designed to be used to split or break rock or concrete by means of the firing of an explosive cartridge an example of which is the tool known as the “Boulder Buster”;
(e) an industrial tool designed to be used in the mining and steel industries to remove refractory material (such as slag) from kilns or for other similar purposes an example of which is the tool known as the “Slag Buster Kiln Gun”;
(f) a captive bolt gun of the kind designed for use in an abattoir in the humane killing of livestock.