SIG Sauer P365-FUSE RXSL | 9mm | 4.3" | ROMEO-X SIG-LOC | 21rd Pistol

The SIG Sauer P365-FUSE with ROMEO-X SIG-LOC (MPN: 365XF9BFORXSL) pairs the long-slide P365-FUSE platform with a factory-mounted enclosed optic. The FUSE extends the P365 family into a 4.3-inch barrel configuration while maintaining the slim grip profile and increasing magazine capacity for shooters who want more full-size handling from the modular P365 system.

The pistol uses a 4.3-inch barrel, LXG polymer grip module with laser-engraved texture, removable magwell, flat-faced trigger, and fiber-optic front sight. The SIG-LOC-compatible slide on this package carries a ROMEO-X SIG-LOC optic, providing a low-mounted enclosed red-dot sighting system from the factory. The FUSE magazine package combines 17-round and 21-round steel magazines for flush-fit and extended-capacity use.

Key Features & Capabilities

• 4.3-Inch Barrel: Long-slide P365 configuration provides increased sight radius and forward mass.
• ROMEO-X SIG-LOC Included: Factory-mounted enclosed optic creates a complete sighting package.
• LXG Grip Module: Laser-engraved texture and interchangeable backstraps support a secure full-hand grip.
• Removable Magwell: Helps guide faster magazine insertion while remaining user removable.
• 17- & 21-Round Magazine Compatibility: FUSE platform supports both standard and extended magazines.

The 365XF9BFORXSL is a strong fit for buyers who want the longer P365-FUSE with a factory SIG-LOC optic rather than sourcing a red dot separately. Browse handguns or shop 9mm ammunition.