RIFLE: CMMG MODEL MK4 RIFLE, SERIAL NUMBER SCG010739, BLACK (MATTE), NOT INCLUDED, SEMI - AUTOMATIC, 5.56 NATO, 16IN Notes: The CMMG Mk4 is a semi-automatic AR-15 pattern rifle chambered in 5.56 NATO. Designed for reliability, accuracy, and modularity, the Mk4 features a lightweight aluminum receiver platform, modern ergonomics, and compatibility with standard AR-15 components and accessories. This rifle is equipped with a Piney 4-12x scope, providing adjustable magnification for enhanced target acquisition and versatility on the range. Features: Manufacturer: CMMG Model: Mk4 Rifle Caliber: 5.56 NATO / .223 Remington Semi-automatic action AR-15 pattern rifle configuration Aluminum upper and lower receivers Direct impingement operating system Free-float or standard handguard (model dependent) Picatinny top rail for optics and accessories Threaded barrel Adjustable stock A2-style pistol grip Detachable magazine Accepts standard AR-15 pattern magazines Includes Piney 4-12x scope Variable magnification optic for versatile shooting applications Compatible with a wide range of AR-15 accessories Black finish Suitable for recreational shooting, target practice, and sporting use