WMD Guns AR-15 NIB-X® Bolt & Carrier Group
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WMD Guns
Overview
The WMD Guns AR-15 NIB-X® Bolt & Carrier Group is engineered for the .308 Win caliber, featuring a Nickel Boron finish that enhances durability and reduces friction during operation. This coating not only improves the ease of cleaning but also contributes to the overall reliability of the bolt carrier group in various shooting conditions. While this specific bolt and carrier group is designed for .308 builds, it is commonly found in configurations that utilize a rifle-length gas system and .223 Remington caliber, making it a versatile choice for builders looking to create a robust firearm.
Specifications
Build history on GunPartPicker
Builders have been adding the WMD Guns AR-15 NIB-X® Bolt & Carrier Group to their builds on GunPartPicker since February 2026. All time, it ranks #297 of the 446 bolt carrier groups builders have added. Builds with this bolt carrier group are split between .308 Win (50%) and .223 Wylde (25%), split between mid-length (50%) and rifle-length (50%) gas systems, and mostly AR-15 (60%, then AR-10 40%).
It was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $204.99 at Brownells for when it comes back.
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Frequently Built With
The part most often added in each category by the builds that include this one
Yankee Hill Machine Complete AR-15 Lower Receiver - M4 Stock
Yankee Hill Machine AR-15 Charging Handle
Wilson Combat AR-15 Billet Upper Receiver
Zro Delta AR-15 Fire Control Group Laser Cut Disconnector
Yankee Hill Machine Co. Diamond Series Handguard, Rifle
Fortis SHIFT Vertical Grip - M-LOK
Build 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.
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