What I was told is that if I wanted to put a fore grip handle on it, it would have to be registered w/ BATFE and I’d have to go through the checks/pay the tax. Not doing so would make it an illegal class 3 any other weapon. As told to me by the class 3 dealer I bought it from. My info is only as good as his.
I didn’t ask about installing one. My questions is , “Would possession of a foregrip handle violate any laws?”
Possession of a unregistered silencer is against the law. Installing one on a firearm is a separate violation.