The Glock 43 features Glock's Safe Action system which provides a consistent trigger pull from the first to the last round. All three safeties disengage sequentially as the trigger is pulled and automatically re-engage when the trigger is released. The frame is made of polymer with hardened steel guides. 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. The barrel is mechanically locked and cold-hammer forged. It 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.