The Glock 43X combines a compact-size grip length, a built-in beaver tail and a subcompact-slim slide for a comfortably balanced, versatile grip thats ideal for a variety of users. It features Glock's Safe Action system which provides a consistent trigger pull from the first to the last round. The three automatic independently operating mechanical safeties are built into the fire control system of the pistol. All three safeties disengage sequentially as the trigger is pulled and automatically reengage when the trigger is released. The frame is made of polymer with hardened steel guides. It features an ideal grip angle and low weight. The slide stop lever and the magazine catch are easily operated with the shooting hand. The advanced surface treatment of the slide results in optimal hardness by considerably reducing wear and tear and it makes it corrosion resistant, even when operating in saltwater conditions. The matte surface minimizes light reflection. The barrel is mechanically locked and cold-hammer forged. It also has the same advanced surface treatment as the slide. Its extractor serves as a loaded chamber indicator to comply with the laws of certain states and its position may visually and physically indicate whether there is a cartridge in the chamber of the pistol. This MOS version features a slide that is precision machined to provide a mounting system for popular optic sights. With multiple adapter plates, you can quickly and easily mount miniature red dot sights. Note: The G43X with the Modular Optic System (MOS) does not come with adapter plates.