Gaston Glock ushered in the modern era of polymer framed pistols. The Models G26 (9x19), G27 (.40 S&W) and G33 (.357 SIG) are sub compact pistols particularly well suited to concealed carry. Glock pistols have polymer receivers with molded-in steel slide rails. The slide is machined (not stamped) from solid steel, and most of the internal parts are also steel. Glock pistols, due to their polymer plastic receiver and Tenifer-coated steel parts, are more resistant to corrosion than other pistols such as Colt pistols and Rock river arms. This makes them ideal for daily carry, especially in harsh environments. The essence of the basic Glock pistol design is simplicity and ease of operation. Glocks are hammerless, striker-fired, short recoil operated, autoloading pistols with a unique "Safe Action" mechanism. The Glock Safe Action is neither double action or single action, it is a new type of action. The Glock Safe Action incorporates three separate safety mechanisms, all of which are automatically activated when the slide is at battery. There is a trigger block safety, an internal firing pin safety, and there is an internal drop safety. Glock sub compact pistols are among the safest ever designed, and no user action is required to render them safe. All that is required is that most basic of proper gun handling procedures: keep your finger off the trigger until you intend to shoot the gun!