AR-15 Barrel, 9mm, 4.5"

Prices last checked September 2026. Prices and availability change often, so confirm on the retailer's site.

Faxon Firearm's 9mm barrels are manufactured from 4150 GBQ Steel. For AR Carbines, they use 1/10 twist to ensure stabilization across all grains of 9mm loadings. Further, they feature QPQ Black Nitride coating for superior corrosion resistance and longevity. Muzzles have ½” x 28 threads, are target crowned, and have concentric threads ready for suppressor use. All barrels are fully magnetic particle inspected.

Note: While the barrels are threaded to 1/2-28 please make sure to use the proper diameter muzzle device.