From The TimeSplitters Wiki

A futuristic shotgun that can be charged to do more damage although one shot (charged or uncharged) to the head is lethal. It uses a battery similar to that of the Plasma AutoRifle and the ElectroTool instead of clips of ammunition. Each shot uses 1 to 3(depending on how long the trigger is held) ammo out of a maximum of 40. It must be 'reloaded' in-between each shot.

Appears in: TimeSplitters Future Perfect Story Levels available in: Breaking and Entering, U Genius U-Genix Weapon Sets: Neon Reccommended Sets: VR, Spaceport