The Strike Industries Ultimate Dust Cover with Flag Engraving (part no. SI-AR-UDC-E-FLAG-223-BK) replaces the standard AR-15 ejection port cover with a capsule-style design featuring an adjustable detent set screw, letting you compensate for receiver wear and dial in exactly how much force it takes to pop the cover open. Strike Industries builds it from black polymer with a flag engraving on the cover face and includes the cover, spring, and pin for a complete, direct-fit replacement. It’s compatible with AR-15/M16/M4 rifles in .223/5.56 and confirmed to fit Billet uppers, which don’t always accept standard covers.

Key Specifications

• Features a flag engraving on the cover face.
• Includes an adjustable detent set screw to compensate for receiver wear.
• Lets you tune the opening power of the cover.
• Compatible with AR-15/M16/M4 rifles in .223/5.56.
• Confirmed to fit Billet uppers.
• Includes the cover, spring, and pin.
• Built in a capsule design, measuring about 3.46 inches.

Frequently Asked Questions

What makes this version different from the plain Ultimate Dust Cover? This one adds a flag engraving on the cover face; the adjustable detent, fitment, and included hardware are the same.

Will this fit a Billet upper? Yes, it’s confirmed to fit Billet uppers.

Buy the Strike Industries Ultimate Dust Cover, Flag Engraving

A worn ejection port cover starts popping open under recoil or sticking shut, and this adjustable Strike Industries cover fixes both problems while adding a bit of flair with the flag engraving. Order it from our Lubbock, Texas gun shop and it ships fast to your door, along with more AR dust covers.