Sig Sauer P320 Full Size 9mm 4.7" Barrel 17+1 Capacity Pistol

The Sig Sauer P320 Full Size delivers proven striker-fired performance with a 4.7-inch barrel and 17+1 capacity for duty, competition, and personal defense applications. This modular handgun features Sig's innovative Fire Control Unit that allows complete customization while maintaining consistent trigger performance across configurations.

What Makes This Different

The P320's modular design centers around a serialized Fire Control Unit that can be transferred between grip modules, slides, and barrel lengths without requiring an FFL transfer. This system provides unmatched versatility compared to traditional fixed-frame pistols. The striker-fired action eliminates external hammers and safeties while maintaining a consistent 5.5-6 pound trigger pull. Nitron-finished stainless steel slides resist corrosion and wear better than standard carbon steel alternatives.

Key Features

• Modular Fire Control Unit allows grip size and caliber changes
• 4.7-inch carbon steel barrel with 1:10 twist rate for 9mm accuracy
• 17-round steel magazine with witness holes and orange follower
• SIGLITE night sights with tritium inserts for low-light targeting
• Picatinny rail accommodates lights and laser accessories
• Ambidextrous slide catch and reversible magazine release
• Textured polymer grip module with interchangeable backstraps

Range testing consistently shows 2-3 inch groups at 25 yards with quality ammunition. The full-size frame provides excellent recoil control for rapid follow-up shots in competitive shooting or defensive scenarios. All-weather reliability stems from the enclosed striker mechanism and corrosion-resistant finish that performs in temperatures from -40°F to 140°F. Law enforcement agencies across North America have adopted the P320 platform for duty use.

Technical Specs

• Overall Length: 8.5 inches
• Height: 5.5 inches with magazine
• Width: 1.4 inches across slide
• Weight: 29.5 ounces unloaded
• Barrel Length: 4.7 inches
• Magazine Capacity: 17+1 rounds
• Sight Radius: 6.6 inches
• Trigger Pull: 5.5-6.0 pounds
• Frame Material: Glass-filled nylon polymer
• Slide Finish: Nitron stainless steel
• Made in USA with limited lifetime warranty

Professional shooters choose the P320 Full Size for its proven accuracy and modular adaptability. Current production models ship with two magazines and are compatible with hundreds of aftermarket accessories. This platform represents serious capability for those requiring dependable performance.