Upgrade your AR-15 upper receiver with the Magpul Enhanced Polymer Ejection Port Cover in OD Green for improved durability and simplified installation. This drop-in replacement addresses common issues with standard USGI stamped-steel covers, including bending, corrosion, and complex setup procedures, delivering reliable performance in demanding conditions. Key Features and Benefits Tool-free snap-in installation - Installs in seconds on compatible forged Mil-spec upper receivers without removing the handguard, barrel nut, winding springs, or adjusting e-clips, saving valuable time during builds or maintenance. Impact-resistant polymer construction - Made from durable, injection-molded polymer that resists corrosion and maintains its shape even after impacts, unlike malleable steel covers that can deform over time. Superior corrosion resistance - Polymer material stands up to moisture and environmental exposure, ensuring long-term functionality and reducing the need for frequent replacements. Consistent spring tension - Designed to hold spring tension reliably, preventing the cover from sagging or flopping loose during use or transport.