legality issue of spud guns in australia...god im lame

yea i most probbebly think they are but if u eva met police they arnt all that bad(unless ur a criminal) and they would most probebly let u keep ur spud gun aslong as u stopped killing ur next door nabours cats. anyway im not sure and i was thinking about asking the gov myself but im not sure what our equivelent to the ATF is if u find out tell me and ill send em an email but if it is ilegal who cares half the fun (for me) in making spudguns is u know u could get in seriuos $|-|!+
for having one of these babies