Wolfman2020

I need help with sten Mk 2 I have an opportunity to buy and need to know if it is real and pre 1986 and legal for me to own it and register it. It belonged to a person that passed away and his 84 year old wife asked me if I wanted to buy it. And I want to know if I can buy it and register it legally. If its been his since 1980 can I buy it and register it legally from his wife or what I can do to own it legally. sn# 42881 is the serial number can anyone date it and help me on the legality issue thanks For the help

I need help with sten Mk 2 I have an opportunity to buy and need to know if it is real and pre 1986 and legal for me to own it and register it. It belonged to a person that passed away and his 84 year old wife asked me if I wanted to buy it. And I want to know if its been his for 60+ years can I buy it and register it legally from his wife or what I can do sn# 42881 is the serial number can anyone date it and help me on the legality issue thanks