shooting with physics

During Christmas break my dad and brother took a little day trip to one of the outer islands with a couple other people. I believe it was Kauai. While they were there they went to a shooting range to shoot- you guessed it- guns. You gotta love America! While there they were experiencing some physics and I bet they did not even realize it. When the bullet is fired from the gun the total momentum stays the same. Momentum is the mass of an object multiplied by its velocity. The net momentum before the rifle is shot and after are both zero. The force that is exerted on the bullet is equal and opposite to the force on the rifle. Going by Newton's Third law, there are equal but opposite impulses between the gun and the bullet. There are also equal but oppositely directed momentum. When the rifle recoiles it has just as much momentum as the moving bullet. Here is a picture of my dad. It looks like he is loading the rifle.