I wanted to investigate what options I have for finishing the barrel on my Savage Model 10 BAT/S once I've removed my muzzle brake so I can use the rifle on a range. According to this video, once I remove my muzzle brake I am going to be left with threads just hanging out the end of my barrel, like this:

The person in the video uses a linear compensator to finish the barrel. Seeing as this is almost a sort of suppressor, are they illegal in Australia or would I be ok to fit one to allow me to use a range?
What are my alternate options? Are there generic threaded end pieces that can finish the barrel? Who in Australia sells or makes them? Just having threads hanging out looks terrible.