Roper Revolving Shotgun (now with dummy cartridges!)

Sylvester Roper is not a well known name in firearms history today, but he made a number of notable contributions to the field - in addition to his work with motorcycles and automobiles where he is much better remembered. The Roper revolving shotgun was an early cartridge-firing repeating shotgun that could carry and fire four rounds without reloading. It was offered in both 12ga and 16ga (this one is 12ga) and used a rather unusual open-bolt mechanism. Cocking t