The 10.5-inch AR-15 pistol upper assembly stands as a cornerstone for those building compact yet powerful AR-15 pistols. Skillfully crafted, it provides the perfect balance between length and ballistic performance, ensuring consistent shooting accuracy. This assembly typically features a shortened barrel, a matching gas system, and often includes an integrated rail system, making it ready for any sights or accessories. Whether for tactical applications or personal defense, this upper is a favorite choice for those prioritizing maneuverability.