SIG Sauer P320 9mm Full-Size Threaded Barrel 5.5"

SIG Sauer P320 Full-Size Replacement Barrel

This is an authentic SIG Sauer factory replacement barrel engineered for the P320 Full-size platform. Built to the same exacting standards as original equipment, it delivers the reliability and precision shooters expect from SIG Sauer.

Key Features

• Caliber: 9mm Luger
• Length: 5.5 inches
• Thread Pattern: 1/2-28 RH (right-hand)
• Finish: Nitron (corrosion-resistant black coating)
• Loaded Chamber Indicator: Yes
• Heat Treatment: Factory heat-treated for superior toughness and durability

What You Need to Know

This barrel is a direct replacement for P320 Full-size models and maintains the precision tolerances SIG Sauer is known for. The threaded design accommodates suppressors and muzzle devices, giving you flexibility for your shooting setup.

The loaded chamber indicator provides a tactile and visual confirmation that a round is chambered—a practical safety feature for defensive and tactical applications.

Important Compatibility Note: This barrel is not compatible with the P320 X-Five slide. Verify your slide model before purchasing.

As a factory component, this barrel represents the gold standard for P320 upgrades and replacements.