The reason it was given to him was because the general knew he would be captured or died. He gave it to the closest german soldier, which was his grandfather. When you pull the slide back, theres an iron cross about an inch back from the muzzle. Theres also a few other German markings on it. The sights are really small on it, so I assume it was used mainly for executions.
His grandfather died last October. I'll see if I can get him to take some pics