WMD Guns

WMD NIB-X Nickel Boron Ejection Port Cover

WMD Guns Wmd NiB-X Nickel Boron Ejection Port Cover - Dust Cover for AR-15 - view 1
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WMD Guns

Overview

The WMD NiB-X Nickel Boron Ejection Port Cover is a steel dust cover designed to protect the ejection port of your AR-15 from debris and contaminants. Its robust construction ensures reliable operation during firing, while the Nickel Boron finish offers enhanced durability and corrosion resistance. This dust cover is frequently found in builds utilizing a carbine gas system and chambered in 5.56 NATO, making it a solid choice for standard configurations.

Specifications

MPNNIBXEPC
MaterialSteel

Available Merchants(1)

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Optics Planet
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$19
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Build history on GunPartPicker

Builders on GunPartPicker first added the WMD NIB-X Nickel Boron Ejection Port Cover to a build in May 2026.

Today the one retailer we track has it in stock. Buying today, the lowest price is $18.89 at Optics Planet.

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Frequently Built With

The part most often added in each category by the 6 builds that include this one

Yankee Hill Machine Co. AR-15 10.5" Threaded Fluted Barrel 1-8 Twist

Yankee Hill Machine Co. AR-15 10.5" Threaded Fluted Barrel 1-8 Twist

Barrel$83 · out of stockin 2 builds
Radian Weapons AR-15 Raptor Ambidextrous Charging Handle FDE

Radian Weapons AR-15 Raptor Ambidextrous Charging Handle FDE

Charging Handle$95in 1 build
Strike Industries Gridlok Full Duty Rail 16" - Black - Elevate Your HK 416 - SI-GRIDLOK-416-FD-16

Strike Industries Gridlok Full Duty Rail 16" - Black - Elevate Your HK 416 - SI-GRIDLOK-416-FD-16

Handguard$400in 1 build
V Seven Weapon Systems AR-15 Ultra-Light Magazine Catch Black Diamonds

V Seven Weapon Systems AR-15 Ultra-Light Magazine Catch Black Diamonds

Magazine Release$27 · out of stockin 2 builds
TruCalibre Enhanced Billet AR-15 Bolt Catch

TruCalibre Enhanced Billet AR-15 Bolt Catch

Bolt Catchin 1 build
Slate Black Industries Vertical Grip M-LOK - Black

Slate Black Industries Vertical Grip M-LOK - Black

Foregrip$19in 1 build

Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Platform

88.6%
AR-1588.6%
AR-109.5%
AR-92%

Caliber

65.6%
5.56 NATO65.6%
.223 Wylde15.9%
300 Blackout7.6%
.308 Win4.2%
6mm ARC1.3%
Other5.4%

Gas System

46%
Mid-Length46%
Carbine28.2%
Rifle14.4%
Pistol10.1%
Intermediate0.6%
Other0.8%

Builds Featuring This Part

See all 4 →

Builds in the community that include the Wmd NiB-X Nickel Boron Ejection Port Cover

BuildPartsTotal
Aero Precision 16" build build
Aero Precision 16" build		27$2324.48
First 5.56 build build
First 5.56 build		14$943.31
recce 10.5" 5.56 build
recce 10.5" 5.56		22$1458.58
12.5" 5.56 build
12.5" 5.56		20$987.06

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