Cannon trigger animation not right

[Eldur]

The cannon trigger isn't animated right. Check the shots I made. When pressing, the button is being pressed - but how?

 

The deal is that the safety cover that protects the MG button flipped forward acts like a trigger that pushes the button in. So the cap handle thingy should move, too.

 

Not a big one, but we look for details in a detailed world :)