When Sanaa tells her story and they show her shooting a guy in a jeep, her sniper rifle doesn't even twitch. Such a weapon would have significant, visible recoil and a heavy shock to her shoulder when firing an actual bullet.
In the assault on Gunther's house, Blake kills the power and uses a night vision device but Sanaa and Donny don't, and yet they go full tilt instead of stumbling through the 'dark'.
At the 41:55 point when the gang is shooting the blue car in the alley there is person visible in the gap between the right side of the cargo container and the building.
In the post-credits press conference scene which takes place in Austria you can clearly see American electrical outlets on the wall.
Boom Boom is from Morris, Illinois and claims that he worked "at the coal mine down the road." There is no coal mine in Morris, IL. The nearest one is about 30-40 miles away and its been abandoned for decades.