Canon

Underslung shotgun

From Halopedia, the Halo wiki

"The only thing I can think of that would make the MA5C any sweeter would be an under-slung shotty or a forty mike mike."
— Anonymous UNSC serviceman[1]

The underslung shotgun is a weapon used by the United Nations Space Command. It can be attached to a service rifle such as the MA5 to aid in close-quarters combat.[1]

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