I imagine they, like most arms makers keep a museum and some samples on display. It's been a family owned business since 1886 beginning in Suhl, until after WWII when the business was moved to Ulm. Since I could never afford them, I ever looked very much at them, simply knowing they have made fine competition shotguns for clay shooting.
Krieghoff made a prototype FG ''paratroopers rifle'' during WWII, but was rejected. They did make a similar weapon, the FG-42 during the war. They also produced the P-08 pistol, (Luger). I imagine their original factory was destroyed by Allied bombing.