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CMMG ZEROED AR-15 Polymer Ejection Port Cover Kit
$11.95 $9.99 Save 16%
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Dan's Review of CMMG ZEROED AR-15 Polymer Ejection Port Cover Kit

I like polymer dust covers to avoid marring the lower receiver when the cover snaps open. I have owned covers from Strike and they are nice but I wanted a cleaner look for my current AR upper project. The CMMG Zeroed dust cover has that clean look, it fits my upper just fine but I look at the tiny details. The dust cover has a tiny amount of flash from the injection molding process. The flash has no impact on function and you wouldn't even notice it unless you're weird like me but I was able to easily remove the flash with a razor blade so now it looks perfect. I am going to leave the dust cover off until I have to install it just in case it would get marred while I'm installing the barrel but I don't see any issues occuring because it seems to fit the ejection port as perfectly as any I've installed. I don't want my AR to be a billboard so I like it a lot.
Pros:
  • Fits well
  • clean
  • Uses standard hardware
Cons:
  • Not as easy to install as a Strike dust cover
Best Used for:
  • Classy ARs with tasteful upgrades
  • Keeping your AR free from dust in the upper receiver.
Would Recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2026-08-16 UTC.