Super Soaker Collector / Administrator
It's certainly not a requirement that forward guns be fixed, and what you're describing is essentially mounting them on a turret. You don't have to look any further than the Sorthak to find an example of this. All of its guns are mounted on various turrets around the ship. It's probably an impractical design to independently or manually target on a regular basis though. The real extent I see it going is having the guns autotrack to your locked component.