I emailed the Western Australian police force regarding the legality of spud guns in WA. Below is my message and its response.
Hi, I have a question regarding the legality of pneumatic spud guns.
So basically are they legal in Western Australia? And if not is there a firearms license that will allow me to posses one?
Email to relevant branch:
To: Firearms Inquiry Unit SMAIL
Subject: File No: carl050208
I would appreciate your assistance with the below email received through the WAPOL Website feedback form. The author has NOT received an automated acknowledgment. Your portfolio/business unit is required to RESPOND DIRECTLY to him/her as per EMAIL POLICY in COPS MANUAL AD-52.21. Please forward a COPY (cc) of your response to WAPS Reply, quoting the above file number in the SUBJECT FIELD for placement on file. If you are not the area responsible for answering this email could you please advise which area is suitable to respond.
Email to me from firearms branch:
Spud guns fall within the description of a firearm under the Firearms Act 1973 however they can't be licensed.
While it is not illegal to construct a spud gun, possession of one is not in the public interest and the item would be confiscated by police and destroyed.
Notice the bolded text stating that the matter is of high importance
On the spud wiki under WA legaility it states that air is OK, Should this be updated?
Western Australia----> Legal if the projectile is expelled by the use of air it is OK. If any explosion occurred from gas, powder, etc. it is illegal and cannot be fired.
If anyone else on Australia has information regarding the legality of spud guns, a quick post in this thread would be appreciated.