The darker area around the mantlet back to just behind the sighting unit on top is the rear part of the gun, and this entire portion can swing upward. When it does elevate, the breech descends below the turret ring and the gunner can load in fresh rounds by standing in the hull. Both guns can elevate/fire independently and have a shell rack above them, a bit like a gravity-assisted magazine, that can hold two rounds at a time.
The turret looks a bit crapped, I am just saying since well I designed most of my tanks around real world thingscrimsonfalke.deviantart.com/ar… the M10 can be fire support and a tank thanks to the suspension system and the gun elevation system. I'm not trying ot be a dick I just want to give critiques and get them
The original drawing wasn't designed with the gunner station behind the cockpit (added that because four 25mm guns and missiles just weren't enough), so the gap between the top of the fuselage sponson and the underside of the wing was too narrow to allow the door to open for a large enough field of view.
The iso variant is a bit stubbier than the cutaway revamp. Actually been meaning to update the picture for shading but since the original file was done in my less organised ways, it'll be easier to rebuild it from scratch.