The Sig Sauer P365 Fuse OR is a semi-automatic 9mm pistol with a 4.3-inch barrel and an optics-ready slide. It has a stainless and black two-tone finish. The package ships with a 17-round magazine and two 21-round magazines. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P365 Fuse 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4.3 in 
• Capacity: 17+1 / 21+1 
• Color/Finish: Stainless and Black 
   

Detailed Features 

• Optics-ready (OR) slide cut for direct-mount red dot 
• Stainless and black two-tone finish 
• Ships with one 17-round and two 21-round magazines 
• 4.3-inch barrel in a mid-size frame 
• Semi-automatic P365 platform

Owners of the P365 Fuse OR are generally pleased with the mid-size step up from the standard P365. The 4.3-inch barrel and longer grip make it more shootable than the compact variant while still being manageable for concealed carry, and the stainless finish gets consistent compliments for its appearance and perceived durability.

The optics-ready cut is a practical feature that owners appreciate, though some note the footprint is proprietary to Sig's ecosystem, limiting direct-mount options compared to more universal cut patterns. The included magazine count is a selling point: shipping with three magazines out of the box is unusual in this category.

Trigger feel on the P365 Fuse divides owners along familiar P365 lines. Most find it adequate for carry use; those who prioritize trigger quality often swap to an aftermarket option early. Overall, the Fuse is viewed as a well-rounded package where the two-tone finish and magazine count justify the price over the base P365.