Reinforced polymer chassis, superior ergonomics, ambidextrous controls, proven safety features. The new standard in reliability when your job is to serve and protect and your life is on the line. The .357 SIG, much like the .357 Magnum and the similarly necked 7.62x25mm Tokarev, is well-suited for use with bullets that are designed to defeat body armor. Also like the Tokarev, the .357 SIG works well when shooting through barriers. There has been a documented case in Texas where a police officer's .45 round did not penetrate a tractor-trailer's shell, but a .357 SIG round from a backup officer's gun did, killing the suspect inside. The round's ability to penetrate barriers is the main reason for its adoption by law enforcement agencies.