Was messing around offline and noticed some small issues with some GVs.
M18; The Gun barrel can pass through the rear part of the tank at full depression.
M16; When 3 of the guns are firing and 1 is blocked the fourth will still recoil as if it is firing, but only a certain one.
The bottom left from the below image will 'fake fire' when blocked, no other guns do that when blocked. Only tested it when blocking the guns with the vehicle itself.
Not sure if it was my angle, but figure I'll mention it just in case;
-The Pz4 gun can pass through the spare 'road wheels' on the back just slightly.
<S>
X