This is the Fury class Hyperspace Beam Cannon. It is the most advanced and one of the strongest beam weapons mounted on Operation Phoenix ships.
The Fury uses a confined section of Enhanced Shadow Bio-armour inside of the barrel to activate its inbred weapons systems. Though bio-armoured ships can create their own splines to fire a directed hyperspace beam, having a ship outfitted with bio-armour may not be desireable. The Fury allows these ships to utilise the advanced weapons supplied by the bio-armour without allowing the bio-armour to spread across the whole ship.