Product Description The TacFire BU9MM4 Pistol Upper Assembly is a complete 9mm Luger upper built for AR-platform lowers, offering a compact 4-inch black nitride barrel and a durable 7075-T6 aluminum receiver with a black anodized finish. Designed for a lightweight, maneuverable setup, it features an M-LOK handguard for versatile accessory mounting and comes fully assembled and ready to install. A bolt carrier group is included to help streamline your build. Product Highlights Complete, ready-to-install AR-platform pistol upper assembly chambered in 9mm Luger Compact 4-inch barrel with black nitride finish for durability and corrosion resistance 7075-T6 aluminum receiver with black anodized finish for strength and long service life M-LOK handguard provides flexible mounting options for accessories Includes bolt carrier group (BCG) for a more complete upper package Specs Brand: TacFire Manufacturer Part Number: BU9MM4 UPC: 729205520242 Type: Complete pistol upper assembly Platform Fit: AR-Platform Caliber: 9mm Luger Barrel Length: 4 in Barrel Finish: Black Nitride Receiver Material: 7075-T6 Aluminum Receiver Finish: Black Anodized Handguard Type: M-LOK Handguard Finish: Black Sights: Optic Ready Included: Bolt Carrier Group (BCG) 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.