If anyone here has any advice on this I would be grateful. I was over visiting one of my elderly uncles recently. We got talking about his father (my grandfather) and his role during the First World War. At one point he got up and returned with two firearms. Up until this point I had no idea he had them. He said they belonged to my grandfather. One of the guns was a Mauser C-96 in decent condition, but starting to develop rust spots. It still had the original mag, spring spent. The second was a small pocket/vest pistol. Looked like a 6.35 mm (Pocket) Haenel, but I am not sure. Tiny little ting. Very good condition, clearly a concealed back up pistol. This pistol was in much better condition. Neither were deactivated. So what does one do? I take it they are in their current state illegal? As they are part of our family history I do not want to give them up. However I am aware they should be deactivated. Is there a proper course of action that should be taken? Any informed advice would be great.