Zaffiri Precision match grade barrels for Sig Sauer P365XL. High quality performance you demand with an easy drop-in barrel upgrade. his 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 Sig barrel. This PORTED Barrel is compatible only with ZPS.4 and ZPS.P slides. Product Features Fit: Sig P365XL Compatible Drop in fit 9mm Ported Barrel Compatible with ZPS.4 and ZPS.P Slides ONLY Threadless Flush & Crown length SAAMI Spec chamber Quality: 416R Stainless Steel Rifling: Broach Cut 6 Groove Twist: 1/10LH Stress relieved and heat treated to RC 40-42 Target crown and oversized lock up area. Fully supported chamber and improved feed ramp design Conventional rifling with a polished chamber and bore to perform well with lead, plated and jacketed bullets Finish Options: Stainless Steel, Black, Titanium Nitride TiN (Gold) Large ZP Logo machined on the Port Side of the lockup. Made in the USA Product Specifications Length: 3.64 inch