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Luth-AR
Overview
The Luth-AR Ejection Port Cover Assembly, model UR-05A, is a robust steel dust cover designed to protect the ejection port from debris and contaminants when the action is closed. This component ensures reliable operation by keeping the internal mechanisms clean, which is especially important for builds utilizing a carbine gas system and chambered in 5.56 NATO. You'll often find this dust cover in rifles focused on functionality and durability.
Luth-AR Ejection Port Cover Assembly - UR-05A ranked #13 of the 55 dust covers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #20 of the 111 dust covers builders have added. Builds with this dust cover are mostly chambered in 5.56 NATO (83%, then 9mm 17%), mostly on carbine-length gas (60%, then mid-length 20%), and mostly AR-15 (83%, then AR-9 17%).
It was in stock most days in August 2026, and today all 6 retailers we track have it in stock. The best price drifted down from $7.04 to $1.49 over August 2026 without a real sale. Buying today, the lowest price is $1.49 at Brownells, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 10+ 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 21 builds that include this one
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Diamondback Firearms Barrel - Black, Unleash Precision and Performance - 556C16MF50B8R
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Luth-AR Ejection Port Cover Assembly - UR-05A
| Build | Parts | Total |
|---|---|---|
 | 16 | $573.88 |
 | 27 | $2969.88 |
 | 18 | $737.15 |
 | 28 | $1172.27 |
 | 27 | $2199.44 |
 | 14 | $714.88 |
 | 14 | $872.65 |
 | 21 | $657.17 |
1 global rating
Top reviews
For a budget build this Luth AR dust cover assembly does the job. Comes complete with the rod, c clip, and spring already on. Hinge pin is a tight fit which is good, no rattle. Black phosphate matches a milspec upper just fine. Cant ask for more at this price.
