The Kar98k rifle's selector switch is set on safe. At the back end of the bolt is a flat tab that is flipped to the right, this is the safety that is set to "safe." In order for the rifle to be fired the tab should be on the left.
In-game, the Lee-Enfield rifle is reloaded by changing the magazine out. While the magazine of the Lee-Enfield rifle can be removed, this is only done for cleaning; loading the Lee-Enfield is the same as most bolt-action rifles: it is loaded from the top using strips.
Lieutenant Pavalovna states that she was attacked by a tank destroyer, when it was only a tank that attacked her.
Whenever a tank is destroyed, the front part where the driver's compartment is starts burning. Given that the fuel is in the back, tanks that are destroyed invariably burn from the back.
According to in-game text, the demolition charges you are using are made of C-4 explosive. C-4 explosive was not invented until 1956.