The Aero Precision X15 Complete Lower is a fully assembled lower receiver for AR-15 rifles, designed to provide a ready-to-use platform for building a complete firearm. As a completed lower, it includes all necessary components, such as the lower receiver, trigger assembly, safety selector, magazine release, buffer tube, buffer, spring, and stock. It is fully assembled and ready to pair with a compatible AR-15 upper receiver, eliminating the need for further assembly or additional parts. Made from high-quality 7075-T6 aluminum, the X15 Complete Lower is precision-machined to Mil-Spec standards for reliability and compatibility with a wide range of AR-15 components. It features an ergonomic design, often paired with Magpul MOE or MOE SL furniture for improved handling and comfort. The lower includes a Mil-Spec single-stage trigger for consistent performance and a Type III hard anodized finish for enhanced durability and corrosion resistance. The Aero Precision X15 Complete Lower offers a robust and reliable foundation for AR-15 builds, suitable for a variety of shooting applications.