​If you come into possession of an unregistered weapon you must take immediate action to ensure it is surrendered either to a licensed Queensland Dealer or a Queensland Police Station for safekeeping

If the owner is unknown the weapon will be dealt with as found property. 

If you wish to acquire the weapon in either circumstance you may apply for a Permit to Acquire 

Unregistered weapons cannot be held in safekeeping by another licensed person until the item is registered.  All licences are conditioned for the possession of registered weapons only.