WMD Guns 9mm 16.5″ NiTroMet Barrel – AR-9 Replacement Barrel

Upgrade your AR-9 build with the WMD Guns 9mm 16.5″ NiTroMet Barrel, a precision-crafted component engineered by a team of metallurgists, chemists, gunsmiths, and plating engineers at the forefront of firearm coating technology. WMD Guns has built a reputation for producing high-performance barrels and components finished with their proprietary NiTroMet coating process — an advanced treatment applied in-house that delivers exceptional corrosion resistance, reduced friction, and enhanced durability compared to standard barrel finishes. Whether you’re completing a custom AR-9 build, replacing a worn barrel, or upgrading for competition or home defense use, this 16.5″ 9mm barrel offers the quality and reliability WMD Guns is known for. At Deep Roots Rifle Co, we carry hard-to-find components like this one so you can build smarter and shoot better. Order online at deeprootsrifleco.com or stop by our gun store in Eustis, Florida to speak with our knowledgeable staff about this barrel and other components for your next custom build.