This Noveske ejection port cover is a mil-spec dust cover for AR-15 upper receivers, engraved with 300 BLK on the outward-facing side. It comes with the port door rod, spring and clip, ready to install. It is a clear way to mark a 300 Blackout upper and avoid mixing up ammunition.
- Fits: Standard mil-spec AR-15 upper receivers
- Engraving: 300 BLK on outward face
- Includes: dust cover, rod, spring, clip
- Color: Black
- Manufacturer part number: 05002580
