Ar-15 Mk3 Ejection Port Cover Kit
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CMMG
Overview
The CMMG AR-15 Mk3 Ejection Port Cover Kit is a durable component designed to keep your firearm's action clean and free from debris by covering the ejection port when not in use. Made from steel, this black dust cover provides reliable performance and protection, ensuring that your rifle functions smoothly in various conditions. This part is commonly found in builds featuring a mid-length gas system and chambered in .223 Wylde, making it a practical choice for those configurations.
Specifications
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.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
| 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% |
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