gwilson

I have just been given a 12 gauge Benelli that also says Heckler & Koch; has numbers "121 SL 80" on the side... Probably about 15+ years old by guess of person who gave it to me (who neber shot it) I can't find any information by google searches, nor can I find a picture similar to it... Any info apprecated by this relative novice. THANKS!