You can find the Faxon Match Series Barrel for G17 Gen 5 Flame Fluting Nitride Threaded here.

Faxon's Match Series Pistol Threaded Barrels for Glock 17 are machined 100% in-house from stress-relieved 416-R steel. These barrels feature Flame Fluting and are then given a black Nitride coating to increase lubricity, barrel life, and resistance to surface wear. All barrels are conventionally rifled to allow a wider range of ammunition, including cast lead. The barrels drop into factory-spec slides with no gunsmithing required. Better-than-factory tolerances ensure a consistent, tighter lockup than OEM barrels.

Specifications:

• Handgun Type: G17 Gen 5
• Barrel Caliber: 9mm
• Barrel Profile: Drop In
• Barrel Material: 416-R
• Barrel Twist: 1:10
• Muzzle Thread: 1/2x28 TPI
• Crown: 11-degree Target Crown
• Rifling Method: Button Rifled, Fully Stress Relieved
• Rifling Type: Conventional
• Inside Finish: Salt Bath Nitride
• Outside Finish: Salt Bath Nitride

Please note: There is a known compatibility issue with Faxon Glock pattern barrels and some patterns of Zaffiri Precision slides. This seems to be an issue with ZPS.3v2 and ZPS.6 pattern slides due to the size and placement of the top window on the slide.