Factual error: In the basement scene where the blind man is shooting at the home invaders with the M9 Beretta, the weapon should lock with the chamber open once the last round is fired. Instead the slide goes forwards, allowing the blind man to continue pulling the trigger.
Factual error: When Money puts the bottle in front of the M9 as a homemade silencer, it completely silences the shot. In reality, the shot would not be reduced to the point of silence. Even store bought silencers (actually suppressors) only reduce the noise by approx 25-35Db (gun shots are about 120 Db) Also you would still hear the slide cycle for the next round as any silencer does not affect that.
Factual error: When she lures the dog into the trunk of the Camaro, there are 2 factual errors. First, she flips down the rear seat to get into the trunk. Second generation Camaros did not have flip down rear seats. Then she pulls a handle under the dash to release the trunk lid. Camaros did not have this feature, either.
Chosen answer: As we see in the film, the houses they burgle have all purchased security systems from Alex's father. This makes it easy for them to gain access to the houses without triggering the alarm. However, if they committed a string of burglaries in which no alarms were triggered, people would eventually put together that customers of the same home security company were being burglarized and would point to them all being inside jobs. By tripping the alarm once they finish, they make it look like a standard break-in.
Phaneron ★