What Are the Specs of the P320 Compact by Sig Sauer?
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
The P320 Compact features a 3.9-inch barrel, 7.2-inch overall length, 5.3-inch height, 1.3-inch width, 15-round capacity, and 6.5-pound trigger pull. It uses a modular striker-fired design with the FCU as the serialized component.
What This Means for Your Setup
The P320 Compact sits in the sweet spot between full-size duty pistols and subcompacts, offering manageable dimensions without sacrificing shootability. Its modular FCU system means you can swap frames, slides, and barrels to create different configurations while keeping the same serialized fire control unit.
The Detail
The P320 Compact measures 7.2 inches overall with a 3.9-inch barrel, giving you a compact package that still maintains decent sight radius and velocity retention. At 5.3 inches tall and 1.3 inches wide, it strikes a balance between concealability and grip real estate.
The striker-fired design delivers approximately 6.5 pounds of trigger pull, which provides a consistent break without the longer pull of traditional double-action systems. The standard magazine holds 15 rounds of 9x19mm, giving you serious capacity in a mid-size frame.
What sets the P320 apart is its modular fire control unit, which serves as the serialized component of the pistol. This means the FCU contains all the trigger components and is legally considered the firearm, while everything else becomes interchangeable parts. You can swap between compact, full-size, and subcompact configurations using the same FCU.
Sig also offers optics-ready versions under the XCOMPACT designation, which come with slide cuts for mounting red dot sights directly to the slide. The platform's modularity extends to aftermarket support, with numerous manufacturers producing compatible frames, slides, and accessories.
Build Impact
The modular FCU system means you're essentially buying into a platform rather than a single pistol, allowing future expansion without additional background checks for frame and slide components. The 3.9-inch barrel length provides good ballistic performance while maintaining concealability for both duty and personal protection builds.