The Remington Model 870 is a U.S.

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

-made pump-action shotgun manufactured by Remington Arms Company, Inc.

Remington Arms

Remington Arms Company, Inc. was founded in 1816 by Eliphalet Remington in Ilion, New York, as E. Remington and Sons. It is the oldest company in the United States which still makes its original product, and is the oldest continuously operating manufacturer in North America. It is the only U.S....

 It is widely used by the public for sport shooting, hunting, and self-defense. It is also commonly used by law enforcement and military organizations worldwide.
The Remington 870 was the fourth major design in a series of Remington pump shotguns. John Pedersen designed the fragile Remington Model 10

Remington Model 10

The Remington Model 10 is a pump-action shotgunwith an internal hammer and tube magazine. It was offered in 12 gauge with barrel lengths from 20 to 32 inches .-Military use:...

 (and later the improved Remington Model 29).