The Wilson Combat AR15/M16 Ejection Port Cover (Wilson Combat part no. TR-EPD300) is a replacement dust cover marked for 300 Blackout rifles, keeping the ejection port sealed against dirt and debris when the bolt is closed. Wilson Combat is one of the most respected names in precision AR15 and 1911 parts, and the ejection port cover is a simple but important part for keeping contaminants out of the action during transport and storage, popping open automatically when the bolt cycles.

Key Specifications

• Built for the AR15/M16 platform’s standard ejection port hinge and pin.
• Marked for 300 Blackout rifles, a common caliber-specific labeling option.
• As the ejection port cover, it keeps dirt and debris out of the action when the bolt is closed.
• It opens automatically when the bolt cycles, requiring no manual operation during firing.
• It is a direct replacement for a cracked, missing, or spring-worn factory dust cover.

Frequently Asked Questions

Does the cover need to be opened manually to fire? No, it opens automatically as the bolt carrier cycles rearward and can be closed again when the action is closed.

Will this fit any AR15 or M16 upper? It is built for the standard AR15/M16 ejection port hinge and pin, which is common across most mil-spec and commercial uppers.

Buy the Wilson Combat AR15/M16 Ejection Port Cover

Order the Wilson Combat AR15/M16 Ejection Port Cover in 300 Blackout marking from Wilson Combat through our rifle parts selection to keep your action protected. Our Lubbock, Texas team can help confirm fitment before you order.