There is no definitive answer to this question as the laws regulating firearms in Australia vary from state to state. However, in most states, it is illegal to possess or use a grip extension unless you have a valid firearms license.
Robert Answered question August 6, 2022
There are no gun laws in Australia that ban grip extenders. However, certain firearms and accessories may be prohibited depending on the state or territory in which you reside. For more information on the specific firearms and accessories that are prohibited in your area, please contact the appropriate authorities.
Matthew Answered question August 6, 2022