As pointed out by u/CosmeticInk5, that's because of the All-Arounder perk, which means that the Bod counts not only as a shotgun, but as an assault rifle, sniper, pistol, and SMG. They rightfully ...
Like all Arknights Operator skins in Delta Force, you get the Wiš'adel Hackclaw skin by pulling for it using a gacha system ...