Description
This factory replacement barrel is made for the Sig Sauer P320 Full-Size (P320FS) pistol and is chambered in 9mm Luger. The barrel measures 5.5 inches and features a Nitron finish and a loaded chamber indicator (LCI). Threading is 1/2-28 RH to accept compatible muzzle devices. SIG SAUER factory replacement barrels are heat-treated for toughness and durability. This barrel is not compatible with the P320 X-FIVE slide.
Key Specifications
- The barrel measures 5.5 inches for Full-Size handling.
- Chambered in 9mm Luger.
- Designed to fit P320 Full-Size (P320FS) configuration.
- Finished in Nitron for corrosion resistance.
- Features a loaded chamber indicator (LCI) for visual/physical chamber status.
- Thread configuration is 1/2-28 RH to accept compatible muzzle devices.
- Sold as a factory replacement and heat-treated for durability.
- Not compatible with the P320 X-FIVE slide.
Built to SIG SAUER factory tolerances, this 5.5-inch threaded barrel provides a direct-fit option for owners of P320 Full-Size pistols seeking a durable replacement or an upgrade for range and competition setups. Its Nitron finish and threaded muzzle allow straightforward attachment of 1/2-28 compatible devices while the loaded chamber indicator supports safe handling practices. For those who prioritize OEM fitment and dependable construction, this barrel delivers a practical, serviceable solution.





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