Does it have flats for a wrench?
I don’t think I’ve ever felt my 22 silencers get really hot, centerfire ones absolutely but not so much with rimfires.
Just think, have you ever burned yourself on the barrel of your 22? I havnt.
Maybe your threads were a bit longer then the threads on the silencer so there were exposed threads which are not caked in carbon and lead.I have a barrel shroud on it, I am guessing it’s just a metric shit ton of carbon based on the rest of it I have cleaning right now.