Sig Sauer BBL3659 P365 9mm Luger 3.1" Black Nitride Steel Replacement Barrel

The Sig Sauer P365 OEM replacement barrel (part BBL3659) is built specifically for the P365 subcompact pistol chambered in 9mm Luger. Whether you are swapping out a worn factory barrel or simply keeping a spare on hand for the range, this factory-original component delivers the same fit and quality that came standard on the pistol.

This barrel features a 3.10-inch length that pairs directly with the P365 slide. It is machined from steel and finished in a durable black nitride coating for excellent wear resistance and corrosion protection. The black nitride treatment hardens the surface and leaves a low-friction, easy-to-clean profile that holds up to regular range use. The BBL3659 ships with no sights installed, allowing the user to transfer existing sights from a factory barrel or run a custom sighting setup.

Designed as a direct-fit replacement barrel for the Sig Sauer P365, this part is chambered in 9mm Luger and is intended for use with standard 9mm Luger ammunition. Installation is straightforward on any P365 pistol that accepts the standard 3.1-inch barrel, making it an excellent option for a barrel swap, spare, or refresh of a well-used carry gun.

Features:

• OEM Sig Sauer replacement barrel, part number BBL3659
• Chambered in 9mm Luger
• 3.10-inch barrel length, direct-fit for the Sig Sauer P365
• Steel construction with durable black nitride finish
• No sights installed - transfer existing sights or run a custom setup
• Designed for the Sig Sauer P365 subcompact pistol