You can achieve this on the first level in the first tournament:
1. just around the corner as you start
2. after the metal walk way, go down the first set of stairs as in do not go down to the left on the second set of stairs, it will be right in front of you on a metal bar.
3. in the area with the train you must get to the other side and it will be to the left of the door you have to enter to progress
4. before going in the last room check through the first window to the left.
5. to the right of the exit building.
(NOTE: you just need to shoot the normal ones)