Kerry Beckenbach, front, and John Duehs both have been volunteering at the Minnesota Military Museum for about a year. They are pictured working on a German Mauser, K98K, from World War II, which came in with surface rust. The gun normally shot 8 mm rounds, but this gun is a unique example of a training gun with an attachment that allowed the gun to shoot .22 caliber bullets, a less expensive way to train.