The Dreg Shotgunner in Darktide does heavy damage with their shotgun at close range, which can very quickly destroy your Toughness and Health bars. To deal with them you should either pick them off from a distance or quickly get into melee with them before they can shoot.
Dreg Shotgunner in Darktide
Dreg Shotgunner Face
Dreg Shotgunner from the side
Dreg Shotgunner from the back
Dreg Shotgunner Weapon