Product DescriptionThe Ruger AR Upper Receiver Stripped 91004 is a stripped upper receiver component built for AR platform projects, replacements, and custom configurations. Made by Ruger and identified as an AR-15 accessory in source data, this upper receiver features a phosphate material/finish and a stripped design that gives builders the flexibility to configure the assembly to their specific needs. The image also shows a flat-top style upper with a continuous top rail for mounting compatible optics and accessories.Product Highlights Genuine Ruger stripped AR upper receiver for custom builds, replacement work, or parts upgrades Phosphate material/finish for a durable, low-glare surface Stripped configuration allows users to complete the upper with the components they prefer Flat-top upper design with top rail visible in product imagery for optic and accessory mounting Manufacturer part number 91004 for easy product identification and ordering Specs Brand: Ruger Product Type: Upper Receiver Configuration: Stripped Platform: AR / AR-15 accessory Material / Finish: Phosphate Model: AR Upper Receiver MPN: 91004 UPC: 736676910045 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.