The answer should be "NO". The AOW comes into play when the object in question is not shoulderable, under 26" OAL and you add a VFG so it is now two handed. What you will have will still be an "other" firearm. Its not a shotgun because it is not meant to be shouldered, not a short barreled shotgun because the OAL is over 26", etc.
I am only 90% as it shoots shot shells. If this was a rifled barrel then I would be certain.