This is a turret that I am making for my sub's AA MG's. The one that will go on my sub is the 3rd one or the leftmost. As you can see it has no independent viewer (its rotation ring is sealed tight), no side armor or any other extra add-ons. The 1st turret from the left is a support gun (50mm) for light armored units. It features an independent viewer, side armor, infrared sensor, gunner's primary sight (GPS, coaxed) and as with all of the turrets it has a diagonal anti-aircraft sight. The middle turret is the same as last turret but goes on a ground vehicles. In a short, first two of three turrets go on vehicles and the third, the last turret goes on my custom sub, :-D -Alex Panzer