The Argus Combat Shotgun is an epibatoi's best friend. The impact armour they wear even has a built in holster behind the shoulder of their dominant hand (opposite the combat knife sheath) to keep it safe. 

When  engaged, the Argus will fire a cloud of hundreds of little 'eyelets' (hence the name), flattened pellets of tungsten laced with iridium, designed to fracture on impact, filling the air in front of boarders with a cloud of whirling and ricocheting razor fragments. Designed to disorient and break formations and cover as much as to lacerate and kill. 

The over-sized magazine can carry up to one hundred cartridges of these deadly little projectiles with 100-150 eyelets per cartridge.

The auxiliary barrels can also fire komos and flash rounds if required.