BioWare just dropped a new free bit of DLC onto the Cerberus Network in the shape of the Arc Projector.
The heavy weapon does this:
The Arc Projector ionizes targets with a non-visible laser to ready them for a high-voltage electrical attack. As the lightning-like bolt hits its first target, a sophisticated auto-targeting system paints succeeding targets with the ionization laser, allowing the electricity to take the path of least resistance and arc between them. An entire enemy strike team can be shocked to death with a few pulls of the trigger. Careful aiming will also allow the user to arc shots to nearby explosives as well.
Cool. The RPG's being well-serviced with DLC, as you'd expect. The Firewalker Pack, what with its five new missions and a free tank is next up, releasing later this month.