Drop-in threaded 9mm barrel for the Ruger RXM 3.9" 9mm pistol. True Precision builds this barrel from 416R stainless steel with a hard-wearing black DLC coating that resists wear, corrosion, and carbon buildup. The 1/2x28 muzzle threads accept standard 9mm compensators, flash hiders, and suppressors. Fit: Ruger RXM 9mm (3.9" standard models). The barrel uses True Precision's proprietary broach-cut rifling and SAAMI-spec chamber, designed to outperform OEM accuracy with mixed ammunition while feeding reliably across hollow point, FMJ, and defensive load profiles. Fits Ruger RXM 9mm pistols (3.9" standard) Caliber: 9mm Luger Material: 416R Stainless Steel Finish: Black DLC Thread pitch: 1/2x28 SAAMI-spec 9mm chamber Broach-cut rifling, drop-in fit Run 150-200 rounds of FMJ through the new barrel to settle it before defensive carry, and verify reliable ejection with your preferred recoil spring weight after the swap. STATE RESTRICTION NOTICE This product may be regulated as an "assault weapon" feature or component (e.g., threaded barrel, muzzle device/compensator, or assembled upper) and may be restricted or prohibited in CA, CT, DC, HI, IL, MA, MD, NJ, NY, RI, VA, WA, and select municipalities. It is the buyer's responsibility to verify local, state, and federal laws before purchase. Orders that cannot ship to a restricted address will be canceled and refunded.