The KRISS Vector is a select-fire .45ACP caliber sub machinegun manufactured by the USA company, KRISS USA. They use an unconventional delayed blowback system combined with in-line to reduce perceived recoil and muzzle climb.
Mirror's Edge: CatalystEdit
Enforcers fire the Vector in bursts, which can quickly deplete Faith's health. However, if Faith builds up a focus shield, the Vector's bullets will deal small amounts of damage to her shield. Should Faith get up close the enforcer will attempt to bludgeon her with their Vector.
In the game, the Vector is called the KA-5 Assault Rifle.