P239 Two-Tone The P239 was developed in response to demands from law enforcement and federal agents for a compact back-up pistol ideal for off duty concealed carry. The slim profile of this single-stack pistol provides easy concealment without sacrificing handling. The P239 Two-Tone features a stainless steel slide machined from barstock and left in a natural stainless finish. The P239 Two-Tone is available in three calibers – 9mm, .357SIG or .40S&W – offering you the choice that’s right for you.