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CMMG, Inc Ejection Port Cover Kit w/ Gas Deflector Color: Black, Condition: New, 36% Off

CMMG Ejection Port Cover Kit, with Gas Deflector 22BA627
CMMG Ejection Port Cover Kit, with Gas Deflector 22BA627
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CMMG Ejection Port Cover Kit, with Gas Deflector 22BA627

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Questions & Answers
Will this work with the CMMG Guard radial delayed blowback 9 MM carbine?

No this gas deflector did not work well with my 9mm Radial Delayed Blowback AR. My gun was jamming with 115, 124, and 147 grain rounds. I tried using standard carbine buffer and H1 and H2 buffers. Nothing worked. Once I removed the dust cover the weapon performed flawlessly.

by JCat, Verified Owner, October 13, 2022
Will these fit Billet uppers? Expert Answer

Yes, it should fit both forged and billet upper receivers.

by Ethan C., Gear Expert, November 13, 2019
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Cmmg 9mm dust cover kit by Nik, March 2, 2016
Perfect fit and finish on my standard milspec ar15 upper. Would recommend for Any pistol caliber build. As with any cmmg products the quality is top notch. Purchashed through optics planet since it was out of stock directly from cmmg.
1/1 found this helpful
Helpful Positive Review
CMMG Ejection Port Kit by PeeWee, August 9, 2016
Well made, makes for a good looking add on for a 22LR conversion. If you don't have one of these on a 22LR conversion there is a large opening behind the bolt. You can always trust CMMG and Optics Planet.
2/3 found this helpful
Helpful Positive Review
Standard for PCC ejection port covers by Rob the independent semi-liberal moderate, Verified Owner, August 10, 2021
It's simple, plain, and the design is elegant. Presuming you don't install the spring backwards, expect this setup to effectively deflect gas and brass from pistol caliber and rimfire AR builds. Finish is solid, and parts are of well tested design ...
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1/1 found this helpful
Helpful Positive Review
9mm ejector cover kit by xsxnn, Verified Owner, July 31, 2024
This port cover works flawlessly. Was a PITA to install but most covers are. And definitely helps with gas when shooting suppressed.
2/3 found this helpful
Helpful Positive Review
Works well at deflecting gas by Mark C, Verified Owner, November 23, 2024
I installed this CMMG ejection port cover/gas deflector on a recent AR9 build and the gas deflection functionality works well since blowback 9mm is gassy. I had a bit of difficulty installing the rod as the gas detector sat too proud to allow for th...
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2/2 found this helpful
Helpful Positive Review
works well for 22 bolt conversion in standard ar upper by Christian, Verified Owner, January 10, 2025
I like the kit a lot. It works well to cover up the hole in the rear of the ejection port when using a 22 bilt conversion kit. However, i gave it 4 stars because the brass deflector part is plastic and the brass will eat away at it after tens of tho...
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1/1 found this helpful
Read All 12 Reviews
Color:
Black
Condition:
New
Included Accessories:
Gas Deflector

Code: 2CM-EPC-22BA627

MPN: 22BA627

UPC: 815835016436

List: $27.99Save 36%
$17.99

Product Info for CMMG, Inc Ejection Port Cover Kit w/ Gas Deflector

Great for almost any shooter, the CMMG Ejection Port Cover Kit w/ Gas Deflector 22BA627 was built to be the perfect way to make sure you have a high quality addition to your gun.image

Specifications for CMMG, Inc Ejection Port Cover Kit w/ Gas Deflector:

Manufacturer: CMMG
Color: Black
Condition: New
Included Accessories: Gas Deflector

Features of CMMG Inc Ejection Port Cover and Gas Deflector:

  • Long lasting
  • Reliable
  • Comes with gas deflector

Package Contents:

  • CMMG Ejection Port Cover Kit w/ Gas Deflector 22BA627

CMMG, Inc Ejection Port Cover Kit w/ Gas Deflector Orderable Models

List of Orderable Models

  • CMMG, Inc Ejection Port Cover Kit, w/ Gas Deflector, 22BA627 , MPN: 22BA627 , UPC: 815835016436 , Code: 2CM-EPC-22BA627

CMMG, Inc Ejection Port Cover Kit w/ Gas Deflector Unavailable & Discontinued Models

List of Unorderable Models

  • USED CMMG, Inc Ejection Port Cover Kit, w/ Gas Deflector, 22BA627, EDEMO2, Used, Condition Fair , MPN: 22BA627-EDEMO2 , Code: 2CM-EPC-22BA627-EDEMO2
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Last updated 2026-10-09 UTC.