Strike Industries Billet Ultimate Dust Cover 223/5.56 NATO FDE AR-15/M4/M16

The Strike Industries Billet Ultimate Dust Cover is a precision-machined solid billet aluminum replacement for the factory AR-15 ejection port cover, purpose-built for 223 Remington / 5.56 NATO AR-15 pattern upper receivers including the AR-15, M4, and M16 platforms.

Finished in Flat Dark Earth (FDE), the Billet UDC is a direct functional upgrade over the standard stamped dust cover, adding meaningful sealing and serviceability. An integrated double seal helps keep dust, sand, and debris out of the action through the ejection port, while an adjustable detent set screw lets the end user dial in the cover tension to their preferred feel.

The signature feature of the Billet UDC is its quick-detach mechanism, which allows the dust cover to be installed or removed in under 10 seconds without having to disassemble the rest of the upper receiver. This makes field cleaning, lubrication, and configuration swaps dramatically faster and easier than working with a factory riveted cover.

Drop the Strike Industries Billet Ultimate Dust Cover onto any compatible .223/5.56 AR-15, M4, or M16 upper to add billet aluminum durability, improved environmental sealing, and tool-free quick-detach serviceability to your rifle build.