I am finishing my Norinco 320, and when I replace the barrel with the one offered from Bushmaster, I see they also offer a barrel shroud attached to the muzzle nut. My question is a shroud legal to use?, and if anybody knows if this shroud they offer is supported around the muzzle or if it is just extended from the nut up the barrel and is free floating? If it is just free floating it seams to me that it would get bent in toward the barrel with any use. This board has been so good with information that has been very useful in my work on my UZI. When it is done I will post some pictures with a full description of what was done so as to maybe help another make some hopefully good decisions on theirs.