I'm no fan of muzzle blast enhancers! However if you find a PH that will not take you then just let me set up the hunt for you and I will take you. these annoying contraptions are not bad for a hunter who shoots it five or ten times on a hunt. However when you work as a PH and you have 6-10 clients in a row all shooting 5-10 animals your hearing will have permanent damage pretty darn quick. I just plug my ears and have to deal with it. I doubt that as many people that have these really need them but I have had some folks with Bursitis or joint problems and they cannot hunt(shoot) without them.
I think you should be able to unscrew this thing and put on a thread protector. That is what I would do and would really like if my hunters would do that too. Many just use them and life goes on. Annoying yes, needed ? who knows? Will I turn down a hunter with one, not a chance.