The Noveske KV3 is not a taxed item. They are serial numbered which could trace them back if ATF changed their minds. I had one on a 7.5 inch barrel, & the amount of erosion internally was a very big disappointment.Another quick question. On the Noveske website they state (quote) "The Noveske KX3 is classified as a flash suppressor by the BATF FTB". Does this mean it is regulated in the same manner as a can? If not, is the statement relevant to legal possesion?