Alot of force on force training involves the exact movements made by Cruise in this clip.
You can easily practice this by setting up 2 targets about 2 yards apart and use a weak hand block to the top of the first target. This is actually a good senario to practice since it is a real possibility it could go down this exact way. I also noticed that the first BG had made the error of holding his weapon sideways like the gangbangers think is cool. It actually can work in your favor if you can strike his arm as he can't recover to be on target if he doesn't get a shot off before you strike his arm.