USAREUR M48A2 - c.1962

[Jakko]

If you intended the arm to be straight but also raised, you should also build up the shoulder, because once an arm is raised above horizontal, the shoulder rises as well to form a straight line with the arm.

[BootsDMS]

As I said earlier, the picture took me back to the Roco Minitanks version:

I used to love their stuff!