The Aero Precision EPC-9 Assembled Upper Receiver is a partially assembled upper receiver designed for pistol-caliber carbines (PCCs) chambered in 9mm or similar calibers. As an assembled upper, it includes pre-installed components such as the ejection port cover and forward assist block. However, it does not include the barrel, handguard, or bolt carrier group (BCG), giving builders the flexibility to customize their firearm with components that suit their specific preferences. This upper receiver is optimized for blowback operation, ensuring reliable performance in PCC builds. Machined from 7075-T6 aluminum, the EPC-9 Assembled Upper Receiver is precision-engineered for durability and compatibility with Aero Precision EPC-9 lower receivers and Glock-pattern magazines. It features a sleek design with a Type III hardcoat anodized finish, providing excellent corrosion resistance and wear durability. The integrated Picatinny rail allows for easy optics mounting, while the absence of a forward assist streamlines the design for PCC applications. With its robust construction and modular compatibility, the EPC-9 Assembled Upper Receiver is an excellent choice for builders looking to create a high-performance pistol-caliber carbine.