Squad Alpha and Beta
Squads Alpha and Beta provide much of the required mobile fire support with their stormbolters and cyclone missile launcher. In addition they are a force to be reckoned with, when their power swords and powerfists go in to action in close combat.
Well versed in close quarters combat within the confines of spaceships and space hulks, the brethren of these squads are known for their accuratcy of firepower. It isn't unusual for them to fire their cyclones down long corridors of the spaceships to exploit rapid breakthrough to critical areas.