locks the slide forward in battery. Given that the MP9 uses the same basic locking mechanism, and has a cyclical rate of fire of 900 rounds/min, the rotating barrel lock has shown itself to be capable of very fast lock times. The thick walled barrel and other metal parts are treated by Tenifer QPQ technology. This hardens the metal components and increases resistance to corrosion. The standard K100 has a barrel length of and operates in both single- and double-action mode. The hammer must be manually decocked for carry in double-action mode with a chambered round. The safety can be applied with the hammer cocked, but can not be applied with the hammer in the forward position. The safety does not lock the slide. A decocking hammer group is available as an option on many models. The ergonomically shaped polymer grip frame houses a steel receiver which provides the rails the slide travels on as well as hardpoints required for the trigger mechanism. The slide spring guide, safety, trigger, and trigger guard are polymer. The pistol's toothy surface, and grooved grips, provide good grip even with wet hands. The K100 also features ambidextrous controls, supporting both left and right-handed users. Current production Grand Power pistols use a solid trigger guard and a new take down lever. They also have 4 user interchangeable grip backstraps to accommodate various hand shapes and sizes; this feature permits most shooters a comfortable and efficient grip on the firearm. Additional models K22S/K22 X-Trim - Two .22lr versions of the K100. The K22S has fixed sights, and the K22 X-Trim has adjustable sights. Both are manufactured on the same steel chassis and grip of the center-fire models, and have steel not zinc alloy slides. They are stand alone firearms, and not conversion kits. Using a direct blowback system rather than the rotary lock up, the rimfire barrels are dovetailed and pinned into the steel chassis. P1 - 93 mm barrel and matching slide using the same frame. P1S - 93 mm barrel and matching slide using the subcompact P11 frame/grip. P1 Ultra - scalloped slide and exposed 93 mm barrel using the same frame. 40 g lighter than the P1. P11 - 85 mm barrel and matching slide with subcompact frame/grip and 12-round magazine. P9M - 93 mm barrel chambered in 9mm Makarov and matching slide using the same frame. X-Trim - A sporting version of