are the guns pointing to the left?
Not exactly- what you are seeing is distorted perspective, caused by the camera's angle relative to the barrels.
The left-side rifle is elevated, and the right-side depressed.
I have seen a lot of old pictures of burnt-out and blown up turrets, and that seems to be a common result.
Whether it's caused by a dead man at the controls, or from the barrels freezing as they were elevated or depressed, is a good question.