The SIG Sauer MPX is a highly regarded pistol caliber carbine (PCC) designed and manufactured by SIG Sauer. It is a versatile and modern firearm that has gained popularity among shooters for its reliability, performance, and modular design. The MPX is based on the AR-15 platform, but it has been specifically engineered to handle pistol calibers like 9x19mm (9mm Parabellum). The barrel length for the SIG MPX varies depending on the model and configuration. It typically ranges from around 4.5 inches to 16 inches. The SIG MPX operates on a gas piston system, which contributes to its smooth recoil and reliability. The gas piston system reduces fouling and heat buildup, making it well-suited for prolonged shooting sessions. One of the standout features of the MPX is its modularity. It comes with a variety of interchangeable components, including handguards, stocks, and grips. This allows users to customize the MPX to their specific needs and preferences. The SIG MPX features ambidextrous controls, such as a reversible charging handle and an ambidextrous magazine release. Some models of the MPX come with threaded barrels, making them suppressor-ready right out of the box. This feature enhances shooting comfort and reduces noise and muzzle rise. The MPX is available in various configurations, including different barrel lengths, stocks, and handguards. It is offered in semi-automatic and select-fire (full-auto) versions, depending on the legal restrictions in specific regions. The SIG Sauer MPX is favored by competitive shooters, law enforcement agencies, and civilian shooters looking for a reliable and adaptable pistol caliber carbine. Its modular design, smooth shooting experience, and high-quality build have earned it a solid reputation among firearm enthusiasts