Continuity mistake: When Steve is telling Kenny to run as fast as he can to the other side of the police car, you can see the front passenger door is still wide open where Kenny got out. It cuts to a shot of the merc firing at them and in the distance you can see the police car, but now the door is closed. Also the windows in the car are miraculously undamaged for being in a shoot out lasting several minutes. (00:46:55)
Continuity mistake: Once the mercs start to shoot at Mike's squad car, they back up quickly and there is a close up of the passenger front tire being shot out and blown. A couple of shots later as they are driving backwards off some parking spots, the tire is perfectly fine. Also the damage to the vehicle appears to lessen. (00:42:50)
Continuity mistake: Interpol agent Sarah approaches a location given to her by the arms dealer trying to find the armed mercs that gunned down the team at the start of the film. As she sneaks up to the door and is peaking in, her gun is holstered on her hip visibly with nothing in her hands. This by itself is a stupid mistake for any police agent to approach the location of a suspected killer merc team without the gun at the ready. When she steps inside and walks into a room, it suddenly shows her holding her gun in her hand. (00:31:45)
Continuity mistake: At the police station, there is a close up of a cup popping down out of a coffee machine as it starts to be filled. The cup is turned so the logo isn't showing. But in the next shot as a lady cop reaches to pull it out, the cup is turned so the logo is facing out towards the camera. (00:26:25)