The Sig Sauer P365XL X-Change Kit, 9mm Luger, 3.70 Inch, Black Nitron (Sig Sauer part number 8901442) is a complete caliber X-Change kit that converts any P365 into a full P365XL. Sig Sauer includes everything needed for the swap: a complete slide assembly finished in durable Nitron, a 3.70-inch barrel, and the grip module that sizes the pistol up to XL dimensions. The slide ships fitted with Sig’s X-RAY3 day/night sights, a 3-dot tritium system that stays visible in low light without a separate purchase. A 12-round steel 9mm magazine rounds out the kit, so the pistol is ready to run in its new XL configuration right out of the box.

Key Specifications

• Complete X-Change kit, converting a standard P365 into a P365XL in one purchase.
• Slide assembly finished in durable Black Nitron.
• Barrel measures 3.70 inches, matching the XL platform’s factory dimensions.
• Fitted with Sig Sauer X-RAY3 day/night sights, a 3-dot tritium system.
• Includes a 12-round 9mm steel magazine.
• Delivers 12+1 capacity once the kit is installed.
• Includes the matching grip module needed to complete the XL conversion.
• Converts a standard P365 frame to the larger XL platform.
• Slide is machined and finished as a complete, ready-to-install assembly, not individual parts.

Frequently Asked Questions

What does this kit include? A complete slide assembly with a 3.70-inch barrel, X-RAY3 tritium sights, a grip module, and a 12-round 9mm steel magazine.

Do I need any other parts to complete the conversion? No, this kit includes everything needed to convert a standard P365 to a P365XL.

Buy the Sig Sauer P365XL X-Change Kit

Convert your P365 to the larger XL platform in one purchase with this complete Sig Sauer X-Change kit. Order it from our Sig Sauer lineup of handgun slides and our Lubbock, Texas team will get it shipped out quickly.