Product Description The Angstadt Arms UDP-9 complete upper receiver assembly is built to pair with a 9mm AR-15 lower receiver, giving you a ready-to-run 9mm upper built with the same quality components used in the UDP-9 pistol. Designed for broad magazine compatibility, this complete upper works with both GLOCK and COLT style 9mm magazines (when used with the appropriate 9mm lower/mag setup). The compact 6-inch configuration is ideal for tight handling and pistol-caliber carbine builds, and it includes key operating components to complete your upper assembly. Product Highlights Complete UDP-9 upper receiver assembly for 9mm AR-15 pattern builds Compatible with both GLOCK and COLT style 9mm magazines (with the correct 9mm lower configuration) Compact 6-inch 9mm Luger barrel length for maneuverable PCC setups Includes 9mm bolt carrier group and charging handle for a true complete upper Black finish for a clean, modern look that matches common AR builds Specs Brand: Angstadt Arms Model/Series: UDP-9 Complete Upper Caliber: 9mm Luger Barrel Length: 6 inch Color: Black Compatibility: 9mm AR-15 lower receiver; supports GLOCK and COLT style 9mm magazines (with appropriate lower/mag setup) Included Components: 9mm bolt carrier group; charging handle UPC: 853427007585 Manufacturer Part Number: AAUT009006 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 products manufacturer.