Well I suppose this is needed
But since you were trying to be completely correct some things bothered me.
The animation of the pistol blowback looks bad because the slide goes back at the same speed of the gun. Realistically the slide moves much faster than the gun blowing your hand back.
The other thing that bothered me was how you showed the SPAS 12 being held by one hand. I don't know if you realize what a big gun that is and the average man definately cannot do that.