The Sig Sauer P320 Compact is a striker-fired 9mm pistol with a polymer frame, stainless steel slide with Nitron finish, and SIGLITE night sights. It holds 15 rounds and sits at 3.9 inches of barrel length — compact enough for carry, but sized to shoot comfortably. 
 

Key Specifications 

• UPC: 798681474264 
• Caliber: 9MM Luger (9x19 Para) 
• Action: Striker-fired 
• Capacity: 15 rounds 
• Barrel Length: 3.9 inches 
• Weight: 26 ounces (1.625 lbs) 
• Frame Material: Polymer 
• Slide Material: Stainless Steel 
• Total Height: 5.3 inches 
• Total Length: 7.2 inches 
   

Features 

 
The striker-fired mechanism gives a consistent trigger pull shot to shot, which most shooters find easier to work with than a DA/SA action. The textured polymer grip holds well under sweat or wet conditions. SIGLITE night sights — single dot front, two-dot rear — work in low light without any additions. Nitron finish on the slide resists corrosion and daily wear. 
 
The P320's modular design is a meaningful feature: the serialized fire control unit swaps between different grip modules and slide assemblies, so you can change calibers or sizes without buying a new gun. 
 

Who It's For 

The P320 Compact works for daily carry, home defense, or range use. It fits a wide range of hand sizes and is approachable for new shooters while having enough capability for experienced users. 
 

Common Uses 

• Concealed carry — 15 rounds in a compact, concealable package 
• Home defense — night sights and a consistent trigger help under stress 
• Sport and range shooting — accurate and easy to shoot fast

The P320 Compact gets broadly positive reviews, with a few recurring discussion points worth knowing before you buy.

The modular design is mentioned often as a real advantage. Being able to swap grip modules or build up a different configuration around the same fire control unit is practical and cost-effective. The trigger is smooth and consistent, which most owners consider a strength. Night sights out of the box are a nice touch at this price point.

The drop safety issue comes up in discussions. Early P320s had a known drop-fire vulnerability that Sig addressed with a voluntary upgrade program. Some owners without the upgrade mention it as a concern for carry. It's worth confirming whether a used example has had the upgrade done.

Grip size gets mentioned occasionally — some users with larger hands find the compact frame tight, and some with smaller hands prefer it over the full-size. It's subjective but worth handling before buying.

On price, the P320 runs a bit higher than comparable compact 9mms. Most owners feel the quality justifies it, but it's a fair consideration against other options in the category.