SIG Sauer P365 FUSE 9mm Compact, 4.3-inch Long Slide, 17+1 Capacity, RMSc Optics Cut, Fiber-Optic Sights
The P365 FUSE stands out with a 4.3-inch carbon steel barrel and long slide, a compact footprint with 17+1 capacity, and a modular P365 FCU-based design. The slide features an RMSc-pattern optics footprint with the cover plate installed, while the full-length MIL-STD-1913 rail, flared/removable magwell, and LXG-style grip texture add practical upgrades. Made in the USA and offered as a recent release in the P365 series.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are some scratches on the slide.
What’s Included
- SIG Sauer P365 FUSE 9mm pistol
- 1x 17-round steel magazine
The FUSE configuration pairs a compact P365 grip size with a 4.3-inch long slide and carbon steel barrel, delivering extended sight radius in a carryable package. Capacity is 17+1 with the included 17-round magazine.
The slide is finished in black and cut with front and rear serrations plus relief cuts near the muzzle. It is optics-ready via an RMSc-pattern footprint and arrives with the cover plate installed. Sights are a green fiber-optic front and a black serrated rear notch for a bright, uncluttered sight picture.
The polymer frame uses SIG’s LXG-style laser-engraved texture for a secure hold. A full-length MIL-STD-1913 Picatinny accessory rail supports lights or other accessories, and the flared, removable magazine well aids confident reloads.
Controls and fire control are straightforward and modern: striker-fired action with a flat-faced trigger and a push-button magazine release. Built on the modular P365 FCU, this pistol remains compatible with the broader P365 ecosystem. Country of origin is the USA.




