Realism is something The Professionals are hot on. "we don't us any equipment that isn't real or in use by security forces"says Martin Shaw. He and his partner choose the guns they will use. "mine is a walther P38" says Martin, "and Lewis has a Smith and Wesson .357 Magnum". "we choose them because they are reliable. The guns we had before tended to jam"
Taken from an interview with Lewis and Martin regarding the real life dangers that both actors had to endure while filming The Professionals.