The Remington 870 is a pump action shotgun which has gained widespread use across civilian, law enforcement and military sectors. The fourth major design of the pump action shotgun by the weapon manufacturer, sales of the weapon have been consistent since it was initially introduced in 1950. There have been hundreds of variations on the M870.

Warning: The following information is from outside Hideo Kojima's core "Metal Gear Saga." It has some level of canonicity within the continuity, but reader discretion is advised.[?]

Several M870s were utilized by the FOX unit during the San Hieronymo Incident in late 1970, to which Naked Snake's resistance later procured.

Non-"Metal Gear Saga" information ends here.

Behind the scenes

Metal Gear Solid: Portable Ops

"With a wide range of applications, this is one of the most famous pump-action shotguns in America, and is extremely popular with both hunters and law enforcement. The Marine Corps ordered a large shipment of these in 1966, and is currently putting them to good use. The M870 sports a variety of configurations, with an adjustable barrel, extendable tube magazine, pistol grip and folding stock. Its ability to respond flexibly to a wide range of tasks is the reason why this gun has earned its solid reputation. Holds seven 12-gauge shotgun shells."
―M870 description in Metal Gear Solid: Portable Ops.
IMG 1889

The M870 in Portable Ops.

Next to the sawn-off Ithaca M37 shotgun is the M870 which is a much better alternative as it holds 7 rounds.

This weapon is an excellent choice for lethal take-downs of enemies at very short ranges.

Its immense stopping power can knock back or knock down enemies or the player when hit with this weapon preventing the victim from attacking temporarily.


The M870 in Metal Gear Solid 4.

Metal Gear Solid 4: Guns of the Patriots

It can be customized with a Dot Sight or a Scope on the Top Mount rail and can carry alternate types of ammunition -- 00 Buck, Slug, or nonlethal V-Ring.

The model in-game is modified with Sage Int. M870 stock, also seen with the M14 EBR.There is also a Masterkey underslung variant compatible to the M4 Custom,and occasionally used by PMC in Act 2 in stand-alone module.

This is a very versatile weapon. For close quarters, it can dispatch most enemies very quickly without careful aim, and for medium to long range, it has optical attachments that allow careful aim with slug rounds. It is recommended that there is always at least one round in the chamber to avoid having to waste time pumping the shotgun on a full reload.

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