Call of Duty: World at War Tips & Tricks

In almost all the missions are secret weapons, like the double-barrel shotgun or the fg.......
The double-barrel shotgun is in 3 missions. I don´t remember in what missions but is in the missions with russians(URSS).
The fg is in the the mission before the last, in one of the 2 houses that are in front the reichstag.Another place is in the mission that you need to destroy 4 panzers.
The double-barrel shotung have 2 presentations:
short and large,the short is with a grip.