I spent much time wondering where and how they filmed some sequences. Certainly looked like Iraq cities and U.S. military bases.
A sequence showing the sniper talking with his wife by cell phone during combat did not seem realistic, but maybe things have changed. My war was long ago.
There was also what I consider excessive profanity, but maybe that is what is expected from Hollywood today.
I have always thought it strange that Hollywood puts too much muzzle flash in films with modern weapons, yet not enough in films portraying say, the Civil War or the Old West. Having owned and fired dozens of different types of pre-1898 guns using black powder, I have noted that they give off huge muzzle flashes and tons of smoke, yet that is rarely seen in period films.
Welcome home, Brother.