The foregrip has to be vertical, and actually attached in some way (rather than precariously balanced, like the NAA mini obviously is), to be an AOW. An angled foregrip makes it an SBR. But a horizontal foregrip (like the carrying handle could be used for) doesn't make the gun an NFA item. Otherwise T/C Contenders would be NFA (and oh, how the BATF has tried!).