A combat shotgun is a shotgun issued by militaries for warfare. The earliest shotguns specifically designed for combat were the trench guns or trench shotguns issued in World War I. From Wikipedia
Season dubbed 'Fortnite OG' launched with restored 2018 map including popular location 'Tilted Towers', reintroduces vintage weapons, and set to update in subsequent weeks replicating progression of original season's map and loot.