Zaffiri Precision Pistol Barrel, Threaded 1/2x28, 9MM, 4.49, TiN Finish, Gold, For Glock 17 Gen 1-4 ZP17BTG Zaffiri Precision match grade barrels for Glock 17 Gen 1-4. High quality performance you demand with an easy drop-in barrel upgrade. This replacement barrel is precision manufactured in the USA to the highest standards providing exceptional accuracy. Conventional rifling with a polished chamber and bore to perform well with lead" plated" and jacketed bullets. This barrel is ready-to-use and is a perfect replacement for your existing Glock barrel.