Introducing the Zaffiri precision match-grade barrels for the Sig Sauer P365XL - where superior craftsmanship meets unparalleled performance. Engineered for those who demand excellence, this drop-in barrel upgrade transforms your firearm with ease. Proudly manufactured in the USA, each barrel is crafted to the highest standards, ensuring exceptional accuracy and reliability. Featuring conventional rifling and a meticulously polished chamber and bore, this barrel excels with lead, plated and jacketed bullets alike. Ready for immediate use, it serves as the ideal replacement for your existing Sig barrel, enhancing your shooting experience with precision and confidence. Compatibility: Sig P365XL - drop-in Fit - 9mm Ported barrel - exclusively compatible with ZPS.4 and ZPS.P slides Threadless flush and crown length SAAMI specification chamber Material specification - 416R stainless steel Rifling - broach-cut - six groove Twist - 1:10 left-handed Subjected to stress relief and heat treatment to achieve a Rockwell hardness of RC 40-42 Target the crown and the oversized lock-up area Enhanced chamber support and optimized feed ramp design The conventional rifling features a polished chamber and bore, optimized for performance with lead, plated and jacketed bullets A large "ZP" logo is machined on the port side of the lockup Manufactured in the USA