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Sons of Liberty Gun Works
Overview
The AR-15 Ejection Port Cover Assembly from Sons of Liberty Gun Works is a critical component designed to keep debris out of the receiver when your firearm is not in use. Made of steel and finished in black, this dust cover ensures reliable operation by protecting the ejection port from dirt and moisture, which can be especially important in adverse conditions. This assembly is frequently found in builds utilizing a carbine gas system and chambered in 5.56 NATO, making it a practical choice for standard AR-15 configurations.
Prices checked
Builders have added the Sons of Liberty Gun Works AR-15 Ejection Port Cover Assembly to their builds on GunPartPicker. Since April 2026, it ranks #11 of the 134 dust covers builders have added. Builds with this dust cover are mostly chambered in 5.56 NATO (85%, then 300 Blackout 12%), mostly on mid-length gas (72%, then carbine-length 17%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today all 5 retailers we track have it in stock. Buying today, the lowest price is $16 at KY Gun Company, above October's low of $13.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every dust cover by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Dust Cover Guide →The part most often added in each category by the builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Ar-15 Ejection Port Cover Assembly
| Build | Parts | Total |
|---|---|---|
 | 23 | $1839.91 |
 | 14 | $3186.28 |
 | 13 | $2712.47 |
 | 23 | $2330.48 |
 | 16 | $1283.68 |
 | 13 | $1903.68 |
 | 15 | $1072.32 |
 | 16 | $792.37 |
 | 21 | $1299.77 |
 | 13 | $960.88 |
1 global rating
Top reviews
Sons of Liberty Gun Works dust cover assembly comes with everything pre-installed which saves the worst install task in AR building. Hinge pin is tight, no rattle. Spring snaps the door open positively. Black phosphate matches most upper finishes.
