SIG Sauer P365 FUSE 9mm Luger, 4.3 in Barrel, Optics-Ready Slide, X-Series LXG Grip, Black Nitron/DLC, 21+1 Capacity
The P365 FUSE is a crossover long-slide variant of SIG Sauer's P365 series, debuted in 2024, with a 4.3 in barrel, optics-ready slide, and a slim 1.1 in width. This example includes two 21-round magazines and one 17-round magazine, an X-Series LXG textured grip with interchangeable backstraps, and a detachable flared magwell, all packaged with the factory case and documentation.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape overall, with minor superficial scratches and blemishes visible on close inspection.
What's Included
- SIG Sauer factory hard case
- Two additional interchangeable backstraps for the grip module
- Detachable flared magazine well (installed)
- Dawson Precision fiber-optic replacement rod (spare) with instructions
- SIG Sauer owner's manual and safety literature
- Three P365 steel magazines: two 21-round and one 17-round (standard-length and extended sizes)
The FUSE configuration stretches the P365 platform with a 4.3 in barrel and 7.2 in overall length, delivering a longer 6.0 in sight radius while keeping width to 1.1 in and unloaded weight to 24.8 oz. The full-length dustcover frames an M1913 3-slot accessory rail for mounting lights or lasers.
The slide wears a black Nitron finish with front and rear serrations and relief cuts near the muzzle. It is optics-ready with an optic cut and cover plate installed. Sights are a green fiber-optic front paired with a serrated black square-notch rear for a clean sight picture.
The striker-fired action uses a flat-faced, nickel-plated trigger. Capacity is up to 21+1, and this pistol ships with two 21-round magazines plus one 17-round magazine to match the crossover format.
Ergonomics come from the X-Series LXG textured grip module with interchangeable backstraps and a detachable flared magwell. The polymer frame is finished in black, while the stainless-steel receiver carries a black DLC finish for added durability.
Construction details include a carbon-steel barrel with a DLC finish and factory markings: the frame is molded "NEWINGTON, NH USA," the slide is marked "P365," and the barrel hood reads "SIG SAUER 9mm LUGER." The mfg part number is 365XF-9-BFO and the pistol is made in the USA.