Kahr's trigger is similar to a double-action revolver, with a short trigger travel. On polymer-framed models, the slide travels on steel inserts that are permanently set into the polymer frame. There are also polymer rails, which are not structurally functional, but aid in keeping out dirt, and with aligning the slide when reassembling the slide onto the polymer frame. In steel framed versions, the rail design is traditional and very similar to that of the M1911 pistol. Kahr pistols have their feed ramps offset to the left, which allows the trigger draw bar to lie flatter against the right side of the frame. This feature helps the Kahr pistol line to achieve a slide width of in 9mm and .40 S&W models, and when chambered in .45 ACP, narrower than many popular pistols.