Bushmaster XM15-E2S Lower Receiver

Mil-Spec indicates that the receiver is manufactured to the standardized dimensions and material specifications established for military-grade AR-15 components. This ensures that it will accept a wide variety of aftermarket parts, triggers, and upper receivers without requiring custom fitting.

Yes, because this is a standard Mil-Spec lower, it is designed to be compatible with virtually any standard AR-15 upper receiver. However, always verify that your specific upper receiver is also built to standard specifications to ensure a proper fit.

No, this is a stripped lower receiver. It does not include internal components like the trigger group, safety selector, magazine release, or buffer tube assembly, allowing you to select the specific parts that best fit your build requirements.

Building a rifle from a stripped lower requires basic mechanical aptitude and specific tools, such as a torque wrench and roll pin punches. While it is a manageable project for a beginner, it is essential to follow a reliable guide and ensure all components are installed safely and correctly.

Absolutely. The Mil-Spec foundation provides a reliable, standardized platform that is well-suited for a precision build. The quality of your final rifle will ultimately depend on the specific barrel, trigger, and optic components you choose to pair with this receiver.