Product DescriptionThe Ruger AR Lower Receiver is a solid foundation for builders assembling a custom modern sporting rifle. This stripped lower receiver is CNC-machined from forged 7075-T6 aluminum for strength and durability, then finished with a hard-coat black anodized treatment to help resist wear. Marked for multi-caliber use and designed for the AR platform, it serves as a centerpiece component for compatible builds, including Ruger AR-556 style configurations. Please note that a lower parts kit, buffer, and stock are required to complete the assembly.Product Highlights CNC-machined from forged 7075-T6 aluminum for reliable strength and long-term durability Hard-coat black anodized finish helps protect the receiver against wear and corrosion Stripped AR lower receiver offers a clean starting point for custom rifle builds Multi-caliber marked design supports versatile AR-style build applications Compatible with Ruger AR-556 style platforms and ideal for custom modern sporting rifle projects Specs Product Type: AR lower receiver Configuration: Stripped Caliber Marking: Multi-Caliber Material: Forged 7075-T6 aluminum Finish: Black anodized Manufacturing Process: CNC-machined Model: AR Series: Lower Receiver Gun Platform: AR-Style Firearm Fit: Ruger AR-556 MPN: 8506 UPC: 736676085064 Brand: Ruger 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.