The SIG Sauer P365 Caliber X-Change Kit in .380 ACP (brand part no. 8900719) lets any P365 owner convert their pistol to the P365-380 configuration without buying a second gun. The kit includes a complete slide assembly finished in Nitron, a matching barrel, SIGLITE night sights for aiming in low light, a grip module sized for the .380 conversion, and one 10-round steel magazine. Because the P365’s fire control unit is the pistol’s serialized part, swapping this kit on is a Title I accessory transaction, not a new firearm purchase. It is a straightforward way to add a lower-recoil option to an existing P365 without a trip to a gunsmith.

Key Specifications

• Converts any SIG Sauer P365 to .380 ACP.
• Includes a complete slide assembly finished in Nitron.
• Fitted with SIGLITE night sights for low-light aiming.
• Includes a grip module sized for the .380 ACP configuration.
• Ships with one 10-round steel magazine.

Frequently Asked Questions

What does this kit include? A complete Nitron-finished slide assembly with barrel, SIGLITE night sights, a grip module, and one 10-round steel magazine.

Does installing this kit require an FFL transfer? No. It is a Title I accessory kit; the P365’s fire control unit remains the serialized part, not the slide or grip module.

What pistols is this kit compatible with? All Sig Sauer P365 models, converting them to the P365-380 configuration.

Buy the SIG Sauer P365 Caliber X-Change Kit

Add a lower-recoil option to your P365 with this SIG Sauer kit, part of our full handgun parts lineup. Order it from our Lubbock, Texas gun shop and our team can help confirm compatibility.