SKU: WMD9MMB10-5-1-10
MPN: 9mm10.5 1-10
The WMD 9mm 5.5" Nitromet Barrel is a precision-engineered component built 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 the balance of velocity, accuracy, and durability that law enforcement and military professionals expect. Whether you're building a custom PCC (pistol caliber carbine), upgrading an AR-9 platform, or assembling a precision 9mm rifle, this component delivers consistent performance across varied ammunition and shooting disciplines.
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, critical for maintaining sub-MOA accuracy at distance. 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. The Nitromet finish resists carbon fouling and rust better than standard parkerizing, reducing maintenance demands in high-round-count training or field conditions.
This barrel excels in AR-9 uppers, 9mm carbines, and PCC competition builds where reliability and precision directly impact performance. The 5.5-inch length positions rounds downrange efficiently while keeping overall platform length manageable for vehicle or close-quarters work—a preferred dimension among tactical competitors and defensive-minded builders. Installation requires a standard barrel wrench and upper receiver work; ensure proper headspace verification with your bolt before running live fire. Compatibility spans most standard AR-9 receiver extensions and bolts that accept 9mm Luger ammunition, making integration straightforward for existing platform owners.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
