So basically my question is this. If i own a multi cal stripper lower. No parts kit. No stock kit. Can i be in possession of a 14.5 upper prior to pinning and welding the FH? Or does the lower still have to registered even though its not stated as a pistol or rifle yet? Im trying to build my upper from scratch so i can get what forend i want on it and this question popped in my head Thank you Wanna kill these ads? We can help!