Product DescriptionThe Aero Precision M4E1 Pro Lower Receiver is built for shooters and builders who want enhanced control and broad AR-15 compatibility in a premium lower platform. This semi-complete lower receiver integrates ambidextrous controls into the M4E1 design, allowing the user to operate the bolt catch, magazine release, and safety more efficiently without changing their dominant firing hand. Finished in black anodizing, it is designed to work with AR15 components and magazines while giving builders flexibility with compatible mil-spec parts and components.Product Highlights Integrated ambidextrous controls support easier manipulation of the bolt catch, magazine release, and safety. M4E1 Pro lower receiver platform designed for AR-15 fit and compatibility with AR15 components and magazines. Semi-complete configuration with proprietary lower receiver componentry preinstalled. Black anodized receiver finish offers a clean, durable appearance for custom rifle builds. Compatible with mil-spec parts and components for flexible builder configuration. Specs Brand: Aero Precision Model: Pro Lower Receiver Series: M4E1 Firearm Fit: AR-15 Platform: AR-Style Hand Orientation: Ambidextrous Type: Semi-Complete Compatible With: AR15 Components and Magazines Finish: Black Anodized UPC: 840014623242 MPN: APAR600030AC 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.