The WMD Guns Buffer Tube Carbine NiB-X Silver is a mil-spec receiver extension built for shooters who want a durable, smooth-running AR-15 or M4-style carbine. Machined from strong 7075 aluminum and finished with WMD’s NiB-X nickel boron coating, this six-position carbine buffer tube is designed to deliver long-term reliability and consistent performance with M4-style adjustable buttstocks.

This model accepts standard AR-15/M16 M4-style adjustable carbine stocks and offers six length-of-pull positions to fit a wide range of shooters and setups. Its lightweight aluminum construction keeps your rifle nimble, while the NiB-X surface treatment enhances lubricity and corrosion resistance for easier cleaning and maintenance. It is a solid choice for range use, training builds, or upgrading an existing carbine, reflecting WMD Guns’ focus on practical innovation and quality machining.

• Manufacturer: WMD Guns
• Model: Buffer Tube Carbine NiB-X Silver (1-NIBXBT)
• Product Type: Buffer Tube
• Material: 7075 Aluminum
• Finish: NiB-X Nickel Boron
• Positions: Six-Position Carbine
• Compatibility: AR-15/M16 With M4-Style Adjustable Carbine Buttstock