The Sirius SX12 is the Vanu entry into the niche of 'high-capacity submachine guns', and is easily comparable to the Blitz GD-10. Favouring a lower calibre round with a high rate-of-fire, the Sirius is able to have a much larger magazine than typical submachine guns while retaining a moderately high damage output, though the weapon's relatively heavy horizontal recoil and lower calibre may hinder the weapon's performance in novice hands or at range.
The Sirius SX12's brother, the Eridani SX5, loads a calibre one step up from the Sirius while earning extra ranged potency in the form of both higher accuracy and more generous damage fall-off. The Sirius' advantage lies solely in its extended magazine, allowing it to beat out the Eridani in extended engagements and allowing it to select attachments like the Advanced Laser Sight without sacrificing magazine capacity.
The Sirius SX12, alongside the Blitz GD-10 and PDW-16 Hailstorm, is part of the so-called 'second generation' of submachine guns, as the three were the second wave of faction-specific weapons to be released in the class.
Created to better suit carbines and assault rifles for support roles, the OG-4's simple crosshair allows the user to make accurate shots at a distance. It uses 4x magnification perfect for mid-range fights.
The weapon's muzzle flash and noise generation is reduced, and the player no longer appears on the minimap when firing. In exchange, the weapon's damage falls off 20 meters sooner, and bullet velocity is reduced by 15%.
A compensator redirects gases upward, reducing vertical recoil. The increased sound pressure will cause the player to show on the minimap from farther away, and increased weapon bulk reduces accuracy when firing from the hip.
It is possible to get both Ribbons and Medals for using the Sirius SX12. Each Ribbon is a standard reward for achieving a set amount of kills with the Sirius. Medals relate to how many overall kills you have with the Sirius.
The Sirius SX12 is named after 'Sirius', a star within the Canis Major constellation. Translated loosely from Greek to 'scorching' or 'glowing', Sirius is the brightest star in Earth's night sky, and is often also referred to as the 'Dog Star', given it's prominence in a constellation oft represented as a canine.