This form allows you to choose a version of the game differs from 1.48.313.561
My game product Version: 1.44.130654

According to the law of conservation of momentum
Sum(m*v) = const

I shoot at a rabbit out of a gun.
Rabbit just falls like a sack! Why is that?
Rabbit should fly off for a couple of meters!

With the AI soldiers situation is not better.
After hitting a bullet in them they can make a couple of steps before falling like a sack.
Hit bullet has no effect on their movement!
Beat the bullet impact equivalent to a sledgehammer! So why does not the AI reacts?