Long story short, I was handed down an old beat up bolt action .410 that was cut too short. It has a nut welded to the barrel where it looks like someone may have attached a flash suppressor or something of the sort. It is about 2 inches short of legal length, and I hate to just chop it up and throw it away. It isn't worth trying to buy a new barrel for it. So I am curious if I could just thread the barrel and put on a muzzle break or flash suppressor of sorts and tack weld it so its legal length.