The Sig Sauer P320 Compact is a semi-automatic 9mm pistol with a 3.9-inch barrel, polymer frame, and 15-round magazine capacity. The modular fire control unit is the defining feature of the P320 platform. The serialized chassis can be moved between different grip modules and slide lengths without tools. 
 

Key Specifications 

• UPC: 798681474196 
• Caliber: 9MM Luger (9x19 Para) 
• Action: Semi Automatic 
• Capacity: 15 Rounds 
• Barrel Length: 3.9 inches 
• Finish: Black Poly Grip/Frame 
   

Detailed Features 

The semi-automatic action cycles on recoil, allowing follow-up shots without manually working the action. At 3.9 inches of barrel, the Compact sits between the Full Size and the Sub-Compact, usable for concealed carry while retaining enough sight radius for accurate shooting. 
 
The 15-round flush magazine gives the P320 Compact more capacity than comparable compact pistols. The polymer grip module houses the trigger group and can be swapped for different sizes (small, medium, or large) to fit different hand sizes without replacing the entire pistol. 
 
The striker-fired trigger has a consistent pull weight with a short, positive reset. 
 

Usage 

The P320 Compact works for both concealed carry and range use. The modular grip system is a real advantage for households or departments where multiple shooters use the same platform. Each can fit the grip to their hand. The 15-round capacity in a compact package is competitive in its class.

The Sig Sauer P320 Compact draws consistent positive feedback, with the modular design, trigger feel, and reliability as the most cited strengths.

The modular platform is the feature owners mention most often as distinctive. The ability to swap grip sizes without disassembly or tools is practical for shooters with different hand sizes, and the option to change slide lengths on the same serialized unit is valued by those who want one registration covering multiple configurations.

The trigger is frequently described as smooth with a consistent pull and short reset, which owners credit for good split times and accurate strings of fire. Reliability across ammunition types is a consistent theme. Owners report few malfunctions across varied loads.

The compact size and 15-round capacity are cited together as a practical combination for concealed carry; owners who carry daily appreciate not giving up capacity for size.

Criticism covers a few areas. Some owners find the compact heavier than lighter polymer alternatives, which matters for all-day carry. Early production P320 models had documented drop safety concerns; Sig addressed this through a voluntary upgrade program, and most current owners note the issue has been resolved in their guns, though it comes up in historical discussions. Some owners want more aggressive grip texturing than the stock module provides.