Bolt Carrier Groups

WMD Guns NiB-X® Coated Bolt Carrier Groups

WMD Guns bolt carrier groups (BCGs) are made with high-performance coatings, leading manufacturing practices and best-in-class materials. With a NiB-X® nickel boron BCG from WMD Guns, you equip your AR for exceptional reliability in virtually any situation.

Every bolt group we sell comes with an in-house application of a coating like our proprietary NiB-X® nickel boron, giving it exceptional lubricity and longevity as well as a presentation-grade finish. WMD Guns is one of few suppliers to design firearm components with the express intention of coating them, resulting in a seamless application and excellent fit and finish.

Explore our selection to find BCGs in multiple calibers, finishes and design options.

The Advantages of a Nickel Boron BCG

The BCG is responsible for firing, extracting, ejecting and chambering new rounds, as well as cocking the hammer every time the action cycles. As such, its reliability is directly tied to the function of your firearm.

WMD Guns’ proprietary NiB-X® nickel boron coating for BCGs delivers a finish over 40% harder than chrome and with a 30% longer life span — even in a rifle bore. It’s also inherently slick, which makes cleaning it effortless and keeps it running long after other parts have slowed or failed due to carbon buildup in the upper. Plus, when it is time for a cleaning, a nickel boron BCG allows the shooter to simply wipe the carbon away with a rag.

The team at WMD Guns has run exhaustive testing on our NiB bolt groups, and they responded by putting thousands of rounds downrange without a single malfunction. Our slick BCGs don’t need extra lubrication and are therefore ideal for applications where lube could attract dust and cause an operational failure, such as military actions in a desert setting. When you need a BCG you can rely on no matter what, there is no substitute.

WMD Guns NiB-X® Coated BCG Options

WMD Guns has bolt carrier groups for sale in multiple styles, including our popular full auto nickel boron BCGs with a polished or matte finish. You’ll find 9mm BCGs as well as .308, 6.5 Grendel and other calibers.

Want to give your gun a little more personality? We sell colorful BCGs with a ceramic topcoat over the NiB-X®, as well as colored bolt groups with coordinating accent kits and individual BCG parts. Over time, the topcoat will wear and expose the NiB-X® on high-friction surfaces to maintain nickel boron’s lasting protection.

We manufacture every component of our BCGs in compliance with military specifications, observing all heat-treatment parameters for longevity and durability. Bolts are shot peened and batch magnetic particle inspected. Everything but the firing pin receives our proprietary NiB-X® coating or one of our other performance finishes for peak lubricity and fouling resistance.

Buy a Nickel Boron BCG From the Arsenal of Firearm Coating Technologies

WMD Guns unites metallurgists, chemists, gunsmiths and engineers to design products that deliver superior performance every time, without fail. We were the first to explore the capabilities of nickel boron for firearm parts like bolt carrier groups, and we’re proud to carry on our legacy of innovation and quality in the products we sell today.

Our nickel boron AR bolt groups are available for sale as complete assemblies or individual parts to create your perfect rig. We’re also happy to discuss custom work. Buy online today or get in touch with our team to experience the performance you only get with WMD Guns.