By A Mystery Man Writer
In 1882 the first pump action shotgun was invented. It was called the Spencer-Roper shotgun and was manufactured by Spencer.
Pump shotgun hi-res stock photography and images - Alamy
The First Pump Gun
The First Pump Action Shotgun: The Complete Story
Mossberg 500 Field pump-action - test & review
Remington 870 Tactical 12 Ga Pump Action Shotgun 18.5 Barrel Black
Who made the first pump shotgun? - Quora
Lever-Action Shotgun: Past, Present And Future - Gun Digest
The Spencer Pump: America's First Pump-Action Shotgun
Pump Action “My First Shotgun” .410 Bore - Keystone Sporting Arms, LLC
GUNS Magazine Remington Model 31 - GUNS Magazine
Taken from an old Twitter Post, but I'm still curious, can anyone identify all these DOOM looking shotguns? Especially the wooden pump action at the top? : r/Doom
Franchi SPAS-12 - Wikipedia
12G Pump Action, Generation Zero Wiki