Wmd 9mm 5.5" Nitromet Barrel

The WMD 9mm 5.5" Nitromet Barrel is a precision-engineered component designed for shooters and gunsmiths who demand accuracy and reliability in competitive, duty, or defensive platforms. This barrel represents the modern standard for 9mm upper assemblies, offering a balance of velocity, accuracy, and durability that law enforcement and military professionals expect.

Constructed with WMD's Nitromet finish—a proprietary corrosion-resistant treatment—this 5.5-inch barrel provides optimal dwell time and velocity for standard 9mm Luger ammunition while maintaining a compact profile ideal for short-stroke platforms. The 1-in-10 twist rate ensures stable bullet flight across the full spectrum of 115- to 147-grain projectiles. WMD's cold-hammer-forged construction creates a harder, more uniform bore than traditional button-rifled alternatives, extending barrel life and minimizing pressure variation shot-to-shot.

This barrel excels in AR-9 uppers, 9mm carbines, and PCC competition builds where reliability and precision directly impact performance. The Nitromet finish resists carbon fouling and rust better than standard parkerizing, reducing maintenance demands in high-round-count training or field conditions. Whether you're building a custom PCC or upgrading an AR-9 platform, this component delivers consistent performance across varied ammunition and shooting disciplines.