Troy A4 Complete Upper 16in 5.56 NATO AR15 Upper Receiver

The Troy A4 Complete Upper from TROY Industries offers a reliable, ready-to-install upper receiver assembly built for 5.56x45mm NATO practice and performance, featuring a 16" barrel and a black finish that blends seamlessly with a wide range of receivers. This complete upper delivers precision-oriented components in one turnkey package, designed to pair with AR-style lowers for shooters seeking a streamlined, drop-in upgrade that supports 223 Rem/556NATO cartridges. The A4 configuration emphasizes a balanced profile and reliable cycling, ideal for varmint days, target sessions, and versatile field use where consistency matters. With its 16" barrel length, the setup strikes a practical compromise between velocity and maneuverability, making it suitable for everything from mid-range distances to fast-paced shooting scenarios. Engineered to withstand demanding conditions, the upper receiver assembly integrates a robust upper platform and diligently machined surfaces to promote smooth chambering and accurate alignment. Whether you're refining a build, replacing worn components, or outfitting a tactical or recreational rifle, this Troy product delivers dependable performance and compatibility with standard AR components for lasting value.