Sig Sauer P320 Convertible 9mm Luger / 357 SIG Pistol

The Sig Sauer P320 delivers unmatched versatility with its convertible design that accommodates both 9mm Luger and 357 SIG calibers in a single platform. This modular striker-fired pistol eliminates the need for multiple firearms when different calibers are required for various applications.

What Makes This Different

The P320's serialized fire control unit allows complete caliber conversion without transferring the firearm through an FFL dealer. Unlike traditional pistols that lock users into a single caliber, this system enables quick changes between 9mm and 357 SIG by swapping the barrel, slide, and magazine. The modular design reduces long-term costs while maximizing training consistency across different caliber requirements.

Key Features

• Convertible 9mm Luger and 357 SIG caliber capability with barrel/slide swap
• Serialized fire control unit enables legal caliber conversion without FFL transfer
• Striker-fired action with consistent 5.5-6 pound trigger pull weight
• Nitron-finished stainless steel slide with enhanced corrosion resistance
• Picatinny rail system accommodates lights and laser accessories
• Interchangeable grip modules in small, medium, and large sizes
• SIGLITE night sights with tritium inserts for low-light visibility

Field performance demonstrates reliable cycling across both calibers with proper ammunition selection. The 357 SIG configuration delivers higher velocity for barrier penetration scenarios, while 9mm provides reduced recoil and higher capacity for training applications. The consistent grip angle and trigger characteristics between calibers maintain muscle memory during transitions. Nitron coating withstands extended exposure to moisture and cleaning solvents without degradation.

Technical Specs

• Calibers: 9mm Luger and 357 SIG (convertible)
• Action: Striker-fired, double-action only
• Barrel Length: 4.7 inches
• Overall Length: 8.5 inches
• Height: 5.5 inches
• Width: 1.3 inches
• Weight: 29.5 ounces (unloaded)
• Sight Radius: 6.6 inches
• Frame Material: Polymer with stainless steel chassis
• Finish: Nitron slide, black polymer frame
• Manufactured: Newington, New Hampshire, USA

The P320's dual-caliber capability eliminates the expense and complexity of maintaining separate pistol platforms. Professional users gain operational flexibility while recreational shooters access two distinct ballistic profiles in one reliable package.