The Tiger Rock Inc. DC223-E 223/5.56 Rifle Dust Cover Complete Assembly is an essential upgrade for AR-15 enthusiasts looking for efficiency and reliability. Its innovative design streamlines the installation process, allowing you to enhance your rifle's functionality in moments. Constructed with premium materials, this ejection port cover combines durability with ease of use. The sleek black finish complements your rifle while the patent-pending internal detent rod eliminates traditional installation hassles. Ejection Port Cover Door (Dust cover) Durable Steel Spring Robust Steel Rod Designed for AR-15 Compatibility Patented spring-loaded design for quick setup Transform your AR-15 experience with this reliable and efficient dust cover assembly.