16" barrel on a pistol. Roll with it. :)
Bear with me. Hypothetical situation.
Let's assume you buy a pistol, pick your poison, but for the sake of this discussion we'll say it's a glock. Now you buy a 16" barrel for it and stuff it into a Roni type system. Would I be correct in my assumption that despite the 16" barrel you saddled it with, you still have created an NFA item by putting a stock and forerip on it?
Whatever the legal standing, if possible could you link to the appropriate documentation.