My opinion is that mere possesion of a handgun with the serial numbers filed off would be a felony in most states. Besides, Filing wont remove a serial number. I wont go into how serial numbers are removed. I'd be very suspicious of anyone trying to sell a handgun legitimately without a serial number. The word "STING" somes to mind... And for some strange reason the name Randy Weaver pops into my head. Buyer beware!!!
Glenn Dee