The Model 870 is a pump-action military shotgun. It was manufactured by Remington Arms and entered service in 1950. It uses a 12-, 16-, 20-, or 28-gauge or .410 bore caliber and a 4- or 7-round ...

Any doubts about the pump-action shotgun being the wave of the future evaporated in 1912 with Winchester ... The chief rival of the Model 12 was Remington’s Model 870 pump. Introduced in 1950 and ...