Crafted from high-strength steel, this mil-spec ejection-port cover assembly is engineered for exceptional durability and dependable performance. It offers a robust seal when closed, safeguarding internal components against harsh environmental conditions. The cover automatically opens during the rifle's cycling process, ensuring uninterrupted operation. This comprehensive assembly comes with all necessary components for straightforward installation on mil-spec AR-15 upper receivers, making it an ideal choice for both replacement and enhancement. Designed for ease of installation, this OEM ejection-port cover assembly guarantees superior functionality and protection, ensuring your firearm operates at its best. The ejection port cover assembly from Sons of Liberty Gun Works is an OEM component specifically engineered for mil-spec AR-15 rifles The assembly provides effective protection for the ejection port, preventing the ingress of dirt, debris and contaminants into the upper receiver, thereby safeguarding firearm performance