Strike Industries Overmolded Ultimate Polymer Ejection Port Dust Cover for AR-15

The Strike Industries Overmolded Ultimate Polymer Ejection Port Dust Cover for AR-15 is a precision-engineered replacement for the stamped steel cover that came with your rifle. If you're tired of cheap, rattling dust covers that don't seal worth a damn or protecting your upper receiver from dirt, sand, and water intrusion during storage and transport, this is the upgrade your AR deserves. Strike Industries redesigned this from the ground up with a double injection molded construction and a rubberized soft sealing lip that actually keeps debris out when the cover is closed—not just sitting there like a sticker.

What sets this apart from the sea of generic polymer covers is the patent-pending "True Seal" internal lip, which grips the ejection port tighter than traditional designs, and the noise-reduction rubber padding that makes it nearly silent when you open and close it. No more that hollow plastic snap that echoes at the range. The housing is made from Strike Industries' proprietary SI Polymer Extreme material—high-strength, impact-resistant, and completely rust-proof, so it won't degrade or warp after years of hard use. An adjustable detent set screw is built in to compensate for wear on your upper receiver over time, keeping that seal tight indefinitely.

Installation is genuinely tool-free: the cover comes pre-assembled and ready to drop on. Removal or reinstallation takes 5 to 10 seconds with nothing more than a pen or small pointed object—perfect if you're timing barrel changes or just want to swap it on and off. Fits Mil-Spec AR-15 upper receivers and Aero Precision M4E1 uppers. If your rifle runs a VLTOR MUR or ZRO Delta upper with a Lantac Enhanced BCG, this cover won't clear the carrier and bolt design, so check your setup first.