The "Mox Weapon" is a weapon that appeared in TimeSplitters 2. Its appearance resembles a prototype version of the Lasergun. In the PS2 version of the game it is not visible at all. The weapon fires multiple lasers, and is used by some of the Mox on the Return to Planet X story mission. The weapon has two fire-modes. Its primary fire is an orange triple-helix laser, and its secondary shoots 3 green orbs in a linear area that arc as they move away from the gun (all 3 hitting an enemy can swiftly kill them). Though these colours match the colours of the two Mox races in the mission, both fire-modes are used by all Mox. The weapon itself, when wielded by the Mox, has the same model as the Sci-Fi Handgun.
This weapon was removed from being a selectable weapon, and is the only weapon that the player can never wield. However, with use of codes & hacks, a player can equip this weapon, albeit without a real model.
The weapon model can be seen being held by Gretel Mark II in the opening cut scene for the Robot Factory (Story), which hints that it was replaced by the Lasergun later on in development. It's interesting to note that one of the screenshots from Gamespot shows Gretel wielding the final version of the Laser Gun, while in the actual cut scene she has the prototype (Mox Weapon). The actual prototype model is found in the game files and can be extracted.