Watch this "At The Range" video segment above to see American Rifleman Field Editor Martin K.A. Morgan shoot a World War II-era M3A1 "Grease Gun" submachine gun chambered in .45ACP.

As with the real M3A1, which did away with the right-side charging handle of the original M3, the Legends Grease Gun fires from an open bolt and is charged via a simple slot cut into the bolt itself.

The Billings Gun Show, taking place Sept. 6-8 at MetraPark, will feature a rare opportunity to view a fully restored M3A1 Scout Car, which was originally manufactured between 1939 and 1944.