The Calico M-950 was initially included in Syphon Filter: The Omega Strain's Beta Version as the Helico pistol-M950, an exotic Auxiliary pistol with a high capacity magazine. The weapon is fired in a slow and controllable form of automatic fire and is suitable for close range combat. Just like it's "sister" (the Calico M-960AS) this weapon is Auxiliary and carried like a conventional Submachine Gun. During the definitive versions of Omega Strain the weapon was not "officially" included and as such cannot be normally encountered, unlocked or used by typical means.