One of the most noticeable differences between P365 models is the barrel length. The original P365 uses a 3.1-inch barrel, which is perfect for maximum concealment and a quick draw from the holster. The XL variant steps up to a 3.7-inch barrel, adding increased velocity and a bit more weight toward the muzzle, which helps reduce felt recoil. Then there is the P365-FUSE, which stretches the barrel to 4.3 inches for the best control and performance in the lineup, while still maintaining the sleek profile of the standard P365.

Longer barrels generally mean higher muzzle velocity and improved accuracy, while shorter barrels keep the pistol compact and easy to conceal. The right choice depends on whether your priority is all-day comfort or enhanced shooting performance.

Slide length goes hand-in-hand with barrel size and can change the overall balance of the pistol. Standard P365 models have a short slide that keeps the gun light and quick to handle. The XL and FUSE models use a longer slide, which improves sight alignment, adds weight for stability, and provides more space for optics.

A shorter slide can make the pistol easier to conceal under light clothing, while a longer slide helps with follow-up shots and target transitions. It comes down to whether you prefer fast handling or a steadier sight picture.

The grip module determines how the pistol fits your hand and how many rounds it can carry. Standard P365 models have a compact grip that keeps the gun small and discreet, usually holding 10 to 12 rounds. The XL, XMACRO, P365X, and FUSE models have extended grips that improve control and increase capacity, with the XMACRO capable of holding up to 17 rounds.

One model to note here is the Sig P365X. This is a cross between a P365 XL lower and a standard 3.1" upper. Allowing you to have the best of both worlds in terms of concealability and magazine capacity. Many prefer this model as the larger grip also allows for more control when shooting, but still allows for comfortable everyday carry.

One of the advantages of the P365 platform is that grip modules are interchangeable, so you can change the size and feel without buying a whole new firearm.

Sig offers several models with integrated compensators, including the Spectre Comp, XMACRO Comp, XL Comp, and AXG Legion. These built-in ports help reduce muzzle rise, making follow-up shots faster and smoother. However, they also limit compatibility. Factory comped slides only work with non-threaded 3.1-inch barrels. Unfortunately, you cannot use a threaded barrel with a comped slide, as the geometry of the slide does not allow you to install a threaded barrel. If you want to run a threaded barrel and external compensator, you will need to replace both the slide and barrel with non-comped versions.

Many shooters make this change to run aftermarket compensators like the True Precision True-Lock or Micro Compensators, which can offer both improved recoil control and a different aesthetic. This switch also allows you to use many different barrel extenders, such as suppressors or flash hiders.

If deep concealment is your top priority, the standard P365 with its short slide, compact grip, and 3.1-inch barrel is hard to beat. The P365XL strikes a nice balance with its longer barrel and grip for added control without being overly large. For those who want maximum capacity and shootability, the P365-FUSE or XMACRO are the top picks. And if you prefer a factory-built recoil solution, an integrated compensator model like the Spectre Comp might be right for you.

True Precision barrels are available in both threaded and non-threaded configurations for every major P365 size. Each one is precision-machined from premium materials and cut with advanced broach rifling for superior accuracy. Designed for reliable feeding with a wide variety of ammunition types, our barrels combine performance and style, with multiple finishes to match your build.

Our slides are crafted with the same attention to detail, offering improved handling, custom styling, and exceptional fitment with OEM and aftermarket components. Currently available for the standard P365 and P365XL, and with a dedicated P365-FUSE slide on the way, these slides feature enhanced serrations, optic-ready cuts, and multiple premium finishes. Whether you want a functional upgrade or a visual statement piece, our slides deliver on both fronts.

We also offer billet-machined True Flat Triggers with a flat face and crisp 90-degree break, designed to improve both control and aesthetics. Our line of custom-machined back plates is available in a variety of finishes, giving you another way to personalize your P365.

All True Precision parts are made in the USA and built for shooters who demand the best in performance, reliability, and compatibility. Whether you prefer a discreet carry pistol or a fully customized build, our components are designed to work together seamlessly, helping you get the most out of your firearm.