AR15/M16 Ejection Port Cover KIT W/ Gas Deflector
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CMMG
Overview
The CMMG AR15/M16 Ejection Port Cover Kit with Gas Deflector is a black steel dust cover that provides essential protection for the ejection port, helping to prevent debris and moisture from entering the chamber during storage or transit. The integrated gas deflector enhances the functionality by redirecting gas and debris away from the user, improving overall shooting comfort and reliability. This component is commonly found in builds featuring a rifle-length gas system and chambered in .308 Win, making it a practical choice for precision and long-range setups.
Specifications
Available Merchants(8)
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Price Alert
September 2026 on GunPartPicker
CMMG AR15/M16 Ejection Port Cover KIT W/ Gas Deflector ranked #26 of the 52 dust covers builders added on GunPartPicker in September 2026. Builders on GunPartPicker first added it to a build in June 2026.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 4 of the 8 retailers we track have it in stock. It dipped to $12.64 at BattleHawk Armory for a stretch in September 2026, well under its usual $14.77, so sales do come around. Buying today, the lowest price is $11.89 at AT3 Tactical, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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We ranked every dust cover by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Dust Cover Guide →Frequently Built With
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