The Sig Sauer P365 Fuse is a compact 9mm semi-automatic pistol with a 4.3-inch barrel. It ships with one 17-round and two 21-round magazines. The finish is OD Green and Coyote Tan with laser-etched TOPO pattern on the grip. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P365 Fuse 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 17rd / 21rd 
• Barrel Length: 4.3 in 
• Color/Finish: OD Green / Coyote Tan with Laser Etched TOPO 
   

Detailed Features 

• Ships with one 17-round and two 21-round magazines 
• Laser-etched TOPO pattern on grip panels 
• OD Green and Coyote Tan two-tone finish 
• Compact frame based on the P365 platform with extended 4.3-inch barrel 
• Optic-ready slide configuration

Owners of the P365 Fuse cite the magazine capacity options as a primary draw, noting that getting 17-round and 21-round magazines out of the box gives meaningful flexibility for carry versus range use. The 4.3-inch barrel on a compact frame is a common talking point, and most shooters find the balance point comfortable during extended sessions.

The TOPO laser-etched pattern gets mixed reactions. Some owners appreciate the texture it adds to grip retention; others find it purely cosmetic and would have preferred aggressive stippling instead. The OD Green and Coyote Tan color combination is popular in the tactical community but draws comments from those who prefer plain black for concealment.

The P365 Fuse generally gets credit for being a capable carry pistol with more round count than its compact dimensions suggest. Reliability reports are positive across the board, though a handful of owners note a break-in period before the action smoothed out.