The WMD Guns WMD NIB-X BCG With Hammer 556 is a premium bolt carrier group engineered specifically for AR-15 platforms chambered in 5.56. Manufactured to tight Defense Industrial Base specifications and finished in WMD’s proprietary NiB-X nickel boron coating, this carrier group is polished to minimize fouling buildup and deliver smooth, consistent cycling over an extended service life.

This BCG is designed for shooters who demand reliability with minimal maintenance. The NiB-X coating has endured over 30,000 rounds in government protocol endurance testing without chipping, flaking, or wearing through, making it especially well suited for short-barrel builds and suppressed setups where fouling is more pronounced. Easy to clean and heat treated for durability, it offers a dependable upgrade that reflects WMD Guns’ focus on long-term performance and practical innovation.

• Manufacturer: WMD Guns
• Model: NIBXBCG-0002
• Type: Bolt Carrier Group
• Color: Silver / NiB-X
• Finish: NiB-X Nickel Boron Coating
• Includes Hammer: Yes
• Caliber Compatibility: 5.56