Pablo Schreiber had extensive military training for his role in 'Den of Thieves'.
Schreiber stars as Ray Merrimen alongside Gerard Butler in the heist movie.
Schreiber revealed the cast had to push themselves when it came to training.
Producers let the cast devise their own intense workouts.
But, the producers also devised extensive and intricate weapons training.
Schreiber trained with his cast mate Curtis '50-Cent' Jackson.
The two play retired soldiers with MARSOC marine backgrounds.
"The kind of training they would receive is a lot more technical and specific."
"The weapons they use are different, the way they move as a team is very different."