Build a reliable and customizable AR-15 platform with the Ruger 91004 AR Stripped Upper Receiver. This precision-machined component serves as the foundation for your custom upper assembly, allowing you to select the exact forward assist, dust cover, barrel, and other parts that match your specific build requirements. Key Features 6061 Aluminum Construction: Crafted from durable 6061 aluminum for a balance of strength and lightweight performance in your firearm build. Anodized Black Finish: Features a professional anodized black finish that provides corrosion resistance and a sleek, tactical appearance. M4 Feed Ramps: Includes M4-style feed ramps to ensure smooth and reliable feeding with compatible ammunition and barrels. Stripped Configuration: Forward assist and port door/dust cover are not included, giving you full control over component selection for a tailored setup. Unmarked T-Marks: T-marks are unmarked, offering a clean look or the option for custom engraving. Specifications Finish: Anodized, Black Forward Assist: Not Included Port Door / Dust Cover: Not Included Receiver Material: 6061 Aluminum T-Marks: Unmarked Feed Ramps: M4 Weight: 8.72 oz Dimensions: 11.7 in (L) x 5.7 in (W) x 2.3 in (H) Benefits for Builders This stripped upper receiver addresses common builder needs by providing a blank canvas for custom AR projects. The lightweight 6061 aluminum reduces overall firearm weight without sacrificing essential structural integrity, while the M4 feed ramps support consistent cycling. Its stripped design eliminates unnecessary pre-installed parts, helping you avoid compatibility issues and reduce costs on components you already own or prefer from other sources. Whether you're assembling a competition rifle, home defense setup, or precision build, the Ruger 91004 offers a dependable starting point that integrates with standard AR-15 pattern components. Why Choose This Product Enables precise customization for optimal performance Professional anodized finish resists wear in demanding conditions Compact dimensions and low weight support versatile builds Backed by Ruger's reputation for quality manufacturing Start your next AR build with confidence using this high-quality stripped upper receiver. Pair it with your choice of barrel, bolt carrier group, and handguard to create a firearm that meets your exact specifications.