The “Easter Egg” is a modified variant of a tactical shotgun issued to Umbra Wardogs units on transport escort assignments. These weapons fire adhesive explosives equipped with motion sensors, capable of detecting movement over a 4 metre distance -ideal for dismantling enemy vehicles in pursuit. Harec found one of these weapons near a group of Umbra Wardogs bodies, that apparently had shot each other to death in their camp.
https://www.youtube.com/watch?v=-WcNNkOKMEM
The shotgun had the name “Matias” engraved in the stock. Harec modified the weapon, discarding the most of its individual components and incorporating others that magnified its effective range. The Raiders’ leader really enjoys using his “snipping shotgun” ever since!