SIG Sauer P365-FUSE 9mm Compact — 4.3" DLC Barrel, Long Slide, Optics-Ready, 21+1 Capacity
This SIG Sauer P365-FUSE is a recent-release compact 9mm with a long-slide profile and a 4.3" DLC-finished carbon steel barrel. It stands out for its optics-ready slide with a two-screw cover plate, high-capacity configuration, and enhanced ergonomics from LXG texturing, interchangeable backstraps, and a removable flared magwell.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There is a light scratch near the front sight; please refer to the photos.
What's Included
- SIG SAUER factory hard case
- 2x 21-round SIG SAUER P365 steel magazines
- 1x 17-round SIG SAUER P365 steel magazine
- Removable flared magazine well (installed)
- SIG SAUER factory interchangeable backstrap – size S
- SIG SAUER factory interchangeable backstrap – size M
- SIG SAUER factory interchangeable backstrap – size L
The FUSE variant pairs the compact P365 frame with a longer slide and 4.3" barrel, delivering a slim, carryable footprint with extended sight radius. The slide includes an optics-ready cut and ships with a cover plate retained by two screws, plus front and rear serrations.
Capacity is configured for 21+1 rounds, and this pistol includes two 21-round magazines and one 17-round magazine. A removable flared magwell is installed to support fast, consistent magazine changes.
Construction features a DLC-finished carbon steel barrel, striker-fired action, and a flat-faced, nickel-plated trigger. The polymer frame wears LXG laser-engraved texturing for secure purchase, and interchangeable backstraps (S/M/L) tailor the grip to the shooter.
Sighting equipment includes a green fiber-optic front in a dovetail and a black rear notch, also in a dovetail. A 3-slot M1913/Picatinny dustcover rail is integrated into the frame for mounting as needed.

