I want to upgrade my Hp carbine 995ts 9mm 19" threaded barrel. Is there any attachments i will need a tax stamp for ? From my understanding the only thing I would need one for would be a suppressor. Would I need one for a muzzle break, barrel shroud, forgrip, optics, etc? I know a rookie question but id rather be safe than sorry. Would any of these have to be ran through the atf?