Yankee Hill Machine Co Dust Cover, 300 Blackout, AR Rifles, Black
Original price was: $16.95.$15.50Current price is: $15.50.
Yankee Hill Machine Co ejection port dust cover, caliber-marked 300 Blackout, Black. Complete drop-in assembly with cover, rod, retaining clip, and spring for standard AR uppers.
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Yankee Hill Machine Co Dust Cover, 300 Blackout, Black
This caliber-marked ejection port dust cover is stamped “300 BLK” so you can identify a chambering at a glance, a handy detail if you run more than one upper. It’s a complete drop-in assembly — cover, rod, retaining clip, and spring — that installs on any standard AR-pattern upper the same way as the factory cover.
Building a 5.56 upper too? Grab the matching YHM Dust Cover in 5.56 NATO, or browse more ejection port doors.
Specifications
- Caliber marking: 300 Blackout
- Color: Black
- Fit: Standard AR-pattern upper receivers
- Manufacturer: Yankee Hill Machine Co
- UPC: 816701017717
- Manufacturer Part #: YHM-111-300
- SKU: YHM-111-300
What’s Included
- 1x Dust Cover
- 1x Hinge Rod
- 1x Retaining Clip
- 1x Spring
| Weight | 0.5 lbs |
|---|---|
| Type | Dust Cover |
| Caliber | 300 Blackout |
| Fit | AR Rifles |
| Color | Black |
| Brand |
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Does this fit any AR-15 upper, or only specific brands?
It fits any standard mil-spec AR-pattern upper receiver with a standard ejection port — brand doesn’t matter as long as the upper uses the mil-spec dust cover hinge.
What’s actually included in the package?
The dust cover itself plus the hinge rod, retaining clip, and spring — everything needed for a complete installation, nothing else to source.
Why would I want a caliber-marked dust cover?
If you run more than one upper in different chamberings, a caliber-marked cover lets you confirm which barrel is mounted at a glance instead of checking the barrel stamp.
Will the “300 BLK” marking wear off over time?
No, the caliber marking is stamped into the cover itself, not printed or painted, so it holds up to normal handling and cleaning.
Does installing this require any special tools?
No, it installs the same way as the factory dust cover — press the hinge rod through the receiver ears and secure it with the retaining clip and spring.
Is the marking just cosmetic, or does the cover itself differ by caliber?
The cover and hinge hardware are mechanically the same across calibers — this version is simply stamped for 300 BLK, so order the version that matches your build’s actual chambering.
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