A very aesthetically-pleasing cannon. It works well against fighters up close but its size is a bit too big for the damage it does. The "wings" on the side of the turret really don't contribute anything useful to the turret itself and just wastes box dimension space when docking it (might want to look into that, assuming this turret isn't meant for roleplay).
It's self-powered so that's nice, and I like the way you did the little spiral star on the side of it. The turret's range is decent too (~700m).
Firepower-wise though it is somewhat weak for its size, but I'm assuming that was because you were going for form over function on this.

I was hesitant to download this given that I don't like to experiment with other people's ships unless I know more about it before I downloaded it. All you provided were pictures and that really wasn't enough to sell it for me. That really cost you a four-star rating in my opinion. Please consider providing some specifications in the description in the future, maybe even some rich backstory behind the construction of the turret for those who like Starmade fiction.