Cartoon Gun (Cuphead)

Information
The Shooting Range shoots duck props in a line either from in front of it to the back, or vice-versa.

The weapon that the Shooting Range is holding appears to be a cartoonish depiction of a 12 Gauge Double Barreled 1878 Charles Parker Side by Side Shotgun, which is also based upon the gun that the Looney Tunes character Elmer Fudd is commonly seen wielding.