The movie American Sniper is quite good. Its action scenes are effective. It moves efficiently between war and peace. It captures the camaraderie, the energy, and the terror present in any military struggle. But it is not a great movie for two main reasons.
At the recruiting office, they give him a brochure for the Seals... and we soon see Chris in basic training. "We're looking for warriors, not quitters." Training is brutal but Chris makes it to sniper school, where his "hell of a gift" sets him apart.