Product Description The Aero Precision EPC-9 Assembled Upper Receiver in Cerakote Flat Dark Earth (FDE) is the ideal foundation for any AR-9 pistol caliber build. Machined from custom forged 7075-T6 aluminum right here in the United States, this upper receiver is built to last and engineered for performance. The durable FDE Cerakote finish provides outstanding corrosion resistance, keeping your upper looking great even after years of heavy use. Featuring a built-in last round bolt hold-open mechanism and compatibility with most standard AR-15 barrel nuts and handguards, the EPC-9 makes it easy to build a high-performing AR-9 chambered in 9x19mm or .40 S&W. Laser engraved T-marks, a standard AR-15 takedown/pivot pin lug pattern, and a barrel dimple for proper handguard timing round out this feature-rich upper receiver. Product Highlights Last Round Bolt Hold-Open Mechanism: Provides a positive indication when the magazine is empty, improving efficiency and shooter awareness during strings of fire. AR-15 Barrel Nut and Handguard Compatibility: Accepts most standard AR-15 compatible barrel nuts and handguards, giving builders a wide variety of configuration options. Forged 7075-T6 Aluminum Construction: Custom forged from high-strength 7075-T6 aluminum for a lightweight yet exceptionally durable upper receiver. Cerakote FDE Finish: The Flat Dark Earth Cerakote coating offers superior protection against the elements while delivering a distinctive tactical aesthetic. Laser Engraved T-Marks and Proper Handguard Timing: Precision laser engraved T-marks and a barrel dimple above the threads ensure accurate accessory placement and correct handguard alignment. Specs Brand: Aero Precision Manufacturer Part Number (MPN): APAR620202AC UPC: 840014611799 Material: Custom Forged 7075-T6 Aluminum Finish: Cerakote Flat Dark Earth (FDE) Compatible Calibers: 9x19mm, .40 S&W Compatible Lower Receivers: Mil-Spec AR-9 Lower Receivers Compatible Barrel Nuts/Handguards: Most Standard AR-15 Compatible Pin Pattern: Standard AR-15 Takedown/Pivot Pin Lug Pattern Engravings: Laser Engraved T-Marks Country of Manufacture: United States Condition: New Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>