Zaffiri Precision Ported Pistol Barrel, 40 S&W, 3.9, Nitride Finish, Black, For Glock 23 Gen 1-3 ZP.23BPBN Zaffiri Precision match grade barrels for Glock 23. 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.