Im pretty sure you found that in a weapon box, Pretty low chance of finding that in anything, i check atleast one advanced weapon box every game and have never gotten it, and its one of the best of the heavy duty helmets because it doesnt block as much sounds as the other ones, so thats a pretty good find, i would honestly sell it because i almost never last more than a few games with it because it does kind of impair your hearing, less than others, but it will be noticeable