The Sig Sauer P365X Fuse is a 9mm semi-automatic pistol from the P365 X-Series line. It has a 4.3-inch barrel and is optics-ready, shipping in a coyote and black two-tone finish. Capacity options include 17 and 21 rounds. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P365X Fuse 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4.3 in 
• Capacity: 17+1 / 21+1 
• Color/Finish: Coyote and Black 
   

Detailed Features 

• Optics-ready (OR) slide cut 
• Longer 4.3-inch barrel compared to the standard P365 platform 
• Accepts 17-round and 21-round magazines 
• Two-tone coyote and black finish

Owners of the P365X Fuse consistently point to the longer barrel as a welcome change, noting improved sight radius over the standard P365. The 4.3-inch configuration sits in a comfortable middle ground for shooters who want more than a pocket pistol but do not want to carry a full-size gun.

The coyote and black finish gets positive reactions, with owners calling it clean and understated. A few note that matching holsters in coyote can be harder to source than standard black options.

The P365X Fuse benefits from the X-Series grip module, which most owners find easier to manage during extended range sessions than the base P365 frame. The optics-ready cut works well with popular micro dots, though the mounting hardware sometimes requires sourcing separately depending on the optic chosen.