The Sons of Liberty Gun Works Mil-Spec Port Door Cover Kit is a straightforward, high-quality replacement or upgrade kit designed for AR-15 platform rifles. Built to mil-spec standards, this kit includes everything needed to install or replace a ejection port door cover assembly, ensuring your rifle stays protected from debris, dust, and fouling when not in use. Crafted from durable materials with a reliable spring-loaded hinge design, the port door cover snaps open automatically upon charging and closes securely to shield the interior of your upper receiver. A simple but essential component for any complete AR-15 build or restoration project. Sons of Liberty Gun Works Mil-Spec Port Door Cover Kit PORTDOORCOVERKIT