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Availability: In Stock
The Sig Sauer P320 Full Size 9mm Luger barrel is a factory replacement part built for shooters who demand reliability and precision from their duty or competition platform. This 5.5-inch threaded barrel opens up suppressor and muzzle device options while maintaining the tight tolerances and durability Sig Sauer is known for. Whether you're upgrading from a standard barrel or maintaining a hard-used duty gun, this OEM component gives you the confidence that you're running genuine Sig engineering.
Manufactured to Sig Sauer's exacting standards, this barrel is specially heat-treated for toughness and durability—meaning it can handle the demands of regular shooting without premature wear or failure. The loaded chamber indicator gives you a fast, tactile way to verify a round is in the chamber without racking the slide, a feature that pays dividends in training and defensive scenarios. The Nitron finish resists corrosion and pairs seamlessly with the rest of your P320 frame and slide.
The 1/2x28 thread pitch is the modern standard for 9mm suppressors and muzzle devices, so you'll have no trouble finding compatible accessories. A protective cap is included to keep the threads clean when the barrel is stored or carried without a muzzle device attached. This is a straightforward replacement part—no guesswork, no compatibility surprises. Swap it in and you're done.
One important note: this barrel is engineered for the P320 Full Size slide and frame; it is not compatible with the P320 X-FIVE slide, so verify your platform before ordering.
| Caliber | 9mm Luger |
| Barrel Length | 5.5 inches |
| Model Fit | Sig Sauer P320 Full Size |
| Threading | 1/2 inch - 28 tpi (threaded) |
| Loaded Chamber Indicator | Yes |
| Finish | Nitron (black) |
No. This barrel is designed for the P320 Full Size slide and frame only. It is not compatible with the P320 X-FIVE slide.
Yes. The 1/2x28 thread pitch is standard for 9mm suppressors and muzzle devices. A protective cap is included to keep the threads clean when not in use.
The loaded chamber indicator provides a tactile (and sometimes visual) confirmation that a round is chambered, allowing you to verify condition of the firearm without racking the slide.
This is a factory Sig Sauer OEM replacement barrel, manufactured to the same specifications and heat-treat standards as barrels installed on new P320 Full Size pistols.
SKU: 115726961 • Width: 4.2in • Height: 1.8in • Depth: 9.5in • Weight: 0.43oz
Availability: In Stock
The Sig Sauer P320 Full Size 9mm Luger barrel is a factory replacement part built for shooters who demand reliability and precision from their duty or competition platform. This 5.5-inch threaded barrel opens up suppressor and muzzle device options while maintaining the tight tolerances and durability Sig Sauer is known for. Whether you're upgrading from a standard barrel or maintaining a hard-used duty gun, this OEM component gives you the confidence that you're running genuine Sig engineering.
Manufactured to Sig Sauer's exacting standards, this barrel is specially heat-treated for toughness and durability—meaning it can handle the demands of regular shooting without premature wear or failure. The loaded chamber indicator gives you a fast, tactile way to verify a round is in the chamber without racking the slide, a feature that pays dividends in training and defensive scenarios. The Nitron finish resists corrosion and pairs seamlessly with the rest of your P320 frame and slide.
The 1/2x28 thread pitch is the modern standard for 9mm suppressors and muzzle devices, so you'll have no trouble finding compatible accessories. A protective cap is included to keep the threads clean when the barrel is stored or carried without a muzzle device attached. This is a straightforward replacement part—no guesswork, no compatibility surprises. Swap it in and you're done.
One important note: this barrel is engineered for the P320 Full Size slide and frame; it is not compatible with the P320 X-FIVE slide, so verify your platform before ordering.
| Caliber | 9mm Luger |
| Barrel Length | 5.5 inches |
| Model Fit | Sig Sauer P320 Full Size |
| Threading | 1/2 inch - 28 tpi (threaded) |
| Loaded Chamber Indicator | Yes |
| Finish | Nitron (black) |
No. This barrel is designed for the P320 Full Size slide and frame only. It is not compatible with the P320 X-FIVE slide.
Yes. The 1/2x28 thread pitch is standard for 9mm suppressors and muzzle devices. A protective cap is included to keep the threads clean when not in use.
The loaded chamber indicator provides a tactile (and sometimes visual) confirmation that a round is chambered, allowing you to verify condition of the firearm without racking the slide.
This is a factory Sig Sauer OEM replacement barrel, manufactured to the same specifications and heat-treat standards as barrels installed on new P320 Full Size pistols.
SKU: 115726961 • Width: 4.2in • Height: 1.8in • Depth: 9.5in • Weight: 0.43oz