According to this article, Johnny Depp and some of Hunter’s friends are in search of a cannon that they will use to grant Hunter’s last wish. Apparently, he wanted his cremated remains to be shot out of a cannon. He always joked that he was cannon fodder anyway, so I guess it makes sense.
Click the link here to read the article from the link above. It kinda moved me to see that there has been such an outpouring of emotions and support.