And They Are Us (episode) - fitted with a scope and used by a South Limbawean sniper attempting to target President Seko Logana. It is unlikely that a light machine gun would have been used as a sniper weapon. More likely it was being used to mimic an SVD Dragonuv designated marksman rifle, which it resembles.
HX-1 (episode) - at Dunkirk's weapons display at Red Rock Flats, [[Armand is seen holding a M78, this time without scope. It was probably intended to represent itself, an M78 light machine gun.