Based off of one of my previous projects (HAL 9000) a few slight modifications and tweaks to one mechanical contraption evolved into another. Great for vanilla custom maps, and is both vanilla and bukkit/spigot compatible!

Made & tested on minecraft 1.9.4. (Singleplayer AND Multiplayer (Even bukkit!) compatible)
If you find other version compatibilities, please let me know!

If you want me to make another more detailed version of the turret with its guns deployed, just leave a comment!