The Aim Sports Dust Cover Assembly (Aim Sports part no. ARDCA) is a black, Mil-Spec replacement for the flap that shields your AR-15 or M4’s ejection port from dirt and moisture between shots. Aim Sports ships it as a complete assembly, so you aren’t left sourcing small hardware just to finish the install. Cut to Mil-Spec dimensions, it drops into the standard AR-15/M4 ejection port opening without any fitting. Keeping the ejection port covered when the bolt is closed helps keep grit out of the action between range trips.

Key Specifications

• Cut to Mil-Spec dimensions for AR-15/M4 ejection ports.
• Ships as a complete assembly with the cover, spring, rod, and C-clip, so it drops in without sourcing extra hardware.
• Finished in black to match most mil-spec uppers.
• Measures approximately 3.1 inches across the cover plate, matching the standard AR-15/M4 ejection port opening.

Frequently Asked Questions

What’s included with this dust cover? It ships as a complete assembly with the cover, spring, rod, and C-clip, so it drops in without sourcing extra hardware.

Will this fit my Mil-Spec AR-15 or M4? Yes, it’s cut to Mil-Spec dimensions for the standard AR-15/M4 ejection port.

Buy the Aim Sports Mil-Spec AR-15/M4 Dust Cover Assembly

A worn or missing dust cover leaves the ejection port exposed to whatever the range throws at it, and this Aim Sports assembly is a complete, direct-fit way to close that gap back up. Order it from our Lubbock, Texas gun shop, and we’ll get it out to you as soon as it’s ready, along with more AR-15 parts and accessories.