Sig Sauer P365 365Xf9Bfo10 9Mm 4.3 Or 3X10R

The Sig Sauer P365 FUSE 9mm combines full-size pistol capability with micro-compact carry dimensions—a genuinely useful crossover for shooters who refuse to compromise between concealability and controllability. Built on the proven P365 platform, the FUSE stretches to a 4.3-inch barrel and 6 7/8-inch optic-ready slide—longer than any compact in its class—for improved sight radius and ballistic velocity. Yet the grip stays wickedly thin at just 1.1 inches wide, making it one of the slimmest 21-round capacity 9mm pistols available. It's the gun for the shooter who carries concealed but wants to train and perform like they're running a full-size duty gun.

The FUSE ships with two 21-round and one 17-round magazine, giving you serious capacity out of the box. The 4.3-inch carbon steel barrel with DLC finish feeds modern defensive ammunition with velocity enough to earn the terminal performance you expect. The slide is aggressively serrated and cut for Shield RMS-c footprint optics, so mounting your red dot is straightforward—no gunsmithing required. Sights are practical too: a fiber-optic front sight for fast target acquisition and a black serrated rear sight for the iron-sight purist.

Ergonomics matter on a carry gun, and Sig got it right here. The LXG (laser-stippled) grip module provides secure, tactile control without sharp edges, and three interchangeable backstrap sizes ensure the gun fits your hand properly. The M1913 accessory rail accepts lights and lasers for serious users. The nickel-plated flat-faced trigger breaks cleanly, and there's no manual safety—just a clean, intuitive shooter's interface. At 23.1 ounces, the FUSE is carry-friendly without feeling flimsy.

This is a gun that bridges a gap. If you've wanted P365 reliability and capacity but always felt a 3.1-inch barrel was a compromise, the FUSE answers that question with a longer sight radius, more muzzle velocity, and superior control—while still disappearing in a good holster.

Key Features

• 4.3-inch barrel with DLC-finished carbon steel for improved velocity and accuracy
• 21-round magazine capacity in a 1.1-inch-wide grip—exceptional for concealed carry
• Optic-ready slide (Shield RMS-c footprint) with aggressive serrations
• 6 7/8-inch sight radius—longest in its compact class—for better accuracy and control
• Fiber-optic front sight and black serrated rear sight for fast target acquisition
• LXG laser-stippled grip with three interchangeable backstraps for custom fit
• M1913 accessory rail for lights and lasers
• Nickel-plated flat-faced trigger for clean, predictable breaks
• Includes three magazines: two 21-round and one 17-round steel magazines

Specifications

Frequently Asked Questions

Can I mount a red dot sight on the P365 FUSE?

Yes. The FUSE slide is optic-ready with a Shield RMS-c footprint, making it straightforward to install a compatible red dot without gunsmithing or modifications.

Is this gun good for concealed carry?

Absolutely. Despite its 4.3-inch barrel and extended sight radius, the FUSE maintains a 1.1-inch grip width and weighs only 23.1 ounces, making it very concealable under normal clothing while delivering the handling and capacity of a larger pistol.

What magazines come with the P365 FUSE?

The FUSE ships with two 21-round magazines and one 17-round magazine—all steel, all ready to run.

How do the interchangeable backstraps work?

The LXG grip module includes three interchangeable backstrap sizes so you can customize the grip to fit your hand properly. Swapping is simple and requires no tools.