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pizzacat1713drops right in
Reviewed on March 29, 2026Verified Purchase
ran 500 rounds zero issues
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Ar-15 Ejection Port Cover Kit
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CMMG
Overview
The CMMG AR-15 Ejection Port Cover Kit is a critical component for keeping debris out of your chamber, ensuring reliable function during operation. Made from durable steel and finished in a sleek black, this cover provides both protection and a clean look to your build. It is commonly found in builds featuring a blowback gas system and chambered in 5.56 NATO, making it a practical choice for those configurations.
Specifications
MPN55BA6E3
MaterialSteel
ColorBlack
Frequently Built With
Based on build data
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Gas Block
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Gas Tube
Radian Forward Assist - 7075 Aluminum - Black
Forward Assist
Wmd Guns Nitromet Ar-15 Bolt Catch
Bolt Catch
Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK
Takedown Pin
Magpul AFG-2 Angled Fore Grip - Black
ForegripBuild Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
86.9%
AR-1586.9%
AR-1011%
AR-92.1%
CaliberBased on real build data showing which calibers builders choose alongside this product.
65.6%
5.56 NATO65.6%
.223 Wylde16.4%
300 Blackout6.4%
.308 Win4.6%
6mm ARC1.2%
Other5.6%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
46.4%
Mid-Length46.4%
Carbine27.3%
Rifle15.8%
Pistol9.3%
Intermediate0.5%
Other0.8%
| Product | Category | Times Built Together |
|---|---|---|
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | Gas Block | 98 |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | Gas Tube | 92 |
| Radian Forward Assist - 7075 Aluminum - Black | Forward Assist | 83 |
| Wmd Guns Nitromet Ar-15 Bolt Catch | Bolt Catch | 67 |
| Strike Industries AR-10 Shift Pins, Black - SI-AR10-SHIFT-BK | Takedown Pin | 66 |
| Magpul AFG-2 Angled Fore Grip - Black | Foregrip | 64 |
| Platform | Percentage |
|---|---|
| AR-15 | 86.9% |
| AR-10 | 11% |
| AR-9 | 2.1% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 65.6% |
| .223 Wylde | 16.4% |
| 300 Blackout | 6.4% |
| .308 Win | 4.6% |
| 6mm ARC | 1.2% |
| .450 Bushmaster | 1.2% |
| 6.5 Grendel | 0.8% |
| 7.62x39mm | 0.6% |
| 9mm | 0.6% |
| .223 Remington | 0.6% |
| .458 SOCOM | 0.4% |
| 7.62x51 NATO | 0.4% |
| .50 Beowulf | 0.4% |
| .204 Ruger | 0.2% |
| .22 ARC | 0.2% |
| 6.8 SPC II | 0.2% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 46.4% |
| Carbine | 27.3% |
| Rifle | 15.8% |
| Pistol | 9.3% |
| Intermediate | 0.5% |
| Blowback | 0.5% |
| Proprietary | 0.3% |
Builds Featuring This Part
See all 7 →Builds in the community that include the Ar-15 Ejection Port Cover Kit
| Build | Parts | Total |
|---|---|---|
 | 26 | $1801.74 |
 | 19 | $567.47 |
 | 19 | $1106.95 |
 | 16 | $907.46 |
 | 21 | $1112.77 |
 | 25 | $1019.08 |
 | 19 | $628.46 |
Customer reviews
5.0out of 5
1 global rating