The Aero Precision EPC-9 Complete Upper is a fully assembled upper receiver for pistol-caliber carbines (PCCs) chambered in 9mm or similar calibers. As a complete upper, it includes all the necessary components such as the upper receiver, barrel, handguard, and gas system (blowback-operated for PCCs), and is ready to attach to a compatible EPC-9 lower receiver. This assembly eliminates the need for further customization or assembly, providing a plug-and-play solution for building a reliable and high-performing PCC. Designed for durability and modularity, the EPC-9 Complete Upper features a precision-machined upper receiver crafted from high-grade aluminum, paired with Aero Precision’s robust handguards that offer M-LOK slots for mounting accessories. Barrels are available in various lengths (typically 5.5", 8.3", and 16"), depending on the intended use, and are optimized for performance in blowback-operated systems. The upper receiver includes a last-round bolt hold-open feature when paired with compatible lower receivers. With its sleek design, durable construction, and compatibility with Glock-pattern magazines, the EPC-9 Complete Upper is a top choice for PCC enthusiasts looking for quality and reliability.