An extended slide catch lever can make the SIG P320 easier to manipulate, especially for owners who struggle to reach the factory control without changing their grip.

The SIG P365 XMacro gives owners a longer, fuller grip than smaller members of the P365 family while maintaining the platform's relatively slim overall architecture.

The SIG Sauer P320 gives new owners a wide range of customization options because the platform is built around a removable Fire Control Unit (FCU). Grip modules, external controls, magazines, magwells, and other components can be selected around that central system, making the P320 highly configurable without requiring every pistol to follow the same setup.

A magwell can be a useful P365 upgrade, but it is not automatically an improvement for every carry setup. The P365 family includes short-grip configurations, XL-style grips, XMacro-size modules, and aftermarket grip designs with different lower-frame geometry.

The SIG Sauer P320 is one of the most modular handgun platforms available, but that flexibility can make magwell compatibility more confusing than buyers expect. A magwell that fits one P320 grip module may not fit another, even when both modules accept the same fire control unit. Grip length, lower-frame geometry, factory beveling, magazine size, and basepad shape all influence whether a magwell works correctly.

The SIG Sauer P365 is built around compact dimensions, but the platform's modular design gives owners plenty of room to tailor a carry setup around hand size, concealment preferences, magazine configuration, and everyday comfort. That flexibility is useful, but it also means a P365 carry build should be planned as a complete system rather than as a collection of individual upgrades.