The Scab 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.

Scab Shotgunner in Darktide

Scab Shotgunner Face

Scab Shotgunner from the side

Scab Shotgunner from the back

Scab Shotgunner Weapon