Aniamtion qeustions

Hi there,

So i have a model from bledswap located here :
It is fully rigged and has a gun, So i was animating it just making a basic walk animation i finished it but when i played it the character moved but the gun stayed in the same place.

What i thought the problem was that i needed to insert it later on in unity3D. So that i have to keep the arm and the fingers in the right position. But is this really needed do i need to make a different walking animation for my rifle and pistol because the hands need to be in a different position. And if so how do i put the gun in its hand in unity later on ?

Regards VB.