Can some one help me with a muzzle break.  I want a post ban gun configuration.  Instead of having a press on muzzle break I would like to silver solder one on a threaded barrel.  Meeting BATF requirements of course.  Has anyone soldered on Stainless barrel ie discoloration etc?  2 If silver soldering a chrome moly barrel what is the best way to rematch the finish?  I know on FALs the dicoloration from a MAPP torch is pretty bad.
3.  Who makes a good threaded break BATF approved for post ban permanant attatchment with solder.  The Wilson is nice but all the ones I have seen have a hole for a blid pin that must be welded up.