SIG Sauer P365-FLUX X-Series Tactical Kit 9mm, 6 in Barrel, ROMEO-X Red Dot, Front Night Sight, 4x 17-Round Mags, Folding Brace
This factory P365-FLUX Tactical Kit (SKU 365FLUX-9-BXR3-RXSL-TACKIT) pairs SIG Sauer's P365 FCU with the FLUX polymer chassis and spring-deploying side-folding brace, a 6 inch barrel with extended muzzle shroud, and a stainless slide with Nitron finish. It comes slide-mounted with a SIG Sauer ROMEO-X red dot optic, a front night sight, and four 17-round magazines, all in excellent condition with case and paperwork. Note: The factory kit originally includes one 25-round magazine and three 17-round magazines; the 25-round magazine is not included with this set. The case label is dated 19-DEC-2025 and marked Made in United States.
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 example appears to have been rarely used.
What’s Included
- SIG Sauer factory hard case with factory label (SKU 365FLUX-9-BXR3-RXSL-TACKIT)
- SIG Sauer ROMEO-X red dot optic, slide-mounted
- 4x 17-round SIG Sauer P365 steel magazines (original 25-round magazine not included)
- SIG Sauer owner's manual and documentation
- Molded Kydex holster with dual belt clips
Built on the P365 FCU and fitted into the FLUX polymer chassis, this configuration adds a forward spare-mag well and a spring-hinged, side-folding brace for fast deployment. The X-Series setup includes a flat trigger shoe and a micro-size footprint.
The 6 inch carbon steel barrel is paired with an extended muzzle shroud that integrates a 1913 Picatinny rail section on the underside for accessories. The stainless slide wears a Nitron finish and features front and rear serrations for positive manipulation.
Factory front night sight is complemented by the included SIG Sauer ROMEO-X red dot optic with a red dot reticle, mounted directly to the slide; the optic provides a backup rear aiming notch.
Capacity is 17+1, supported by four factory P365 steel magazines. Note: The original factory 25-round magazine that ships with this kit is not present. Documentation includes the SIG Sauer owner's manual, and the case label dated 19-DEC-2025 notes Made in United States; the frame serial number matches the case label.