Mean Arms Bearing Delay 9mm Luger 4.5in Upper Receiver AR-15 1/2-28 Matte

The Mean Arms BEARING DELAY 9MM LUGER COMPLETE UPPER RECEIVER is a ready-to-fire AR-15 upper that combines precise 9mm Luger performance with rugged reliability in a matte black finish. This 4.5-inch upper delivers a compact, pistol-caliber platform ideal for sport shooting, home defense, and range training, offering a streamlined upgrade path for builders seeking a clean, ready-made solution without compromising compatibility or fit. Built as a complete upper, it integrates seamlessly with AR-15 receivers and features a 1/2-28 muzzle threading for compatible slides and compensators, enabling smooth installation and versatile accessories. The matte finish not only provides a low-reflective, durable appearance but also helps resist wear from handling and cycling. Designed to pair with standard AR-15 components, this upper extends your firearm's capabilities into the 9mm Luger category while maintaining reliable cycling and dependable performance across varied shooting scenarios. Whether you're expanding a sport rifle setup or refining a dedicated 9mm build, this complete upper from Mean Arms delivers a clean, efficient platform with practical length and robust construction for consistent, accurate shooting.