SIG Sauer P365 XL XSeries 9mm Luger, 3.7 in Barrel, X-RAY3 Tritium Sights, Black Nitron, 12+1
The SIG Sauer P365 XL XSeries blends the slim P365 profile with an XL-length 3.7 in barrel, a flat-faced XSeries trigger, and a purpose-built XSeries grip module with an extended beavertail. It comes equipped with X-RAY3 day/night sights, a stainless slide with a black Nitron finish, and front and rear slide serrations. This example includes two 12-round magazines and the SIG factory case.
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: The pistol presents in great shape. Minor superficial scratches and blemishes are visible under normal handling. The bore is clean and shiny.
What’s Included
- SIG Sauer factory hard plastic case (gray) with model label 365XL-9-BXR3
- 2 SIG Sauer OEM 12-round steel magazines (Made in USA) for the P365 series
Built on the XSeries platform, this P365 XL pairs a 3.7 in barrel with the slim P365 footprint to deliver an extended sight radius while maintaining a 1.1 in width. The XSeries grip module adds an extended beavertail for secure purchase, and the flat-faced trigger provides a consistent, straight-press feel.
The slide is stainless steel with a black Nitron finish and features both front and rear serrations for confident manipulation. A rear sight plate allows mounting of compatible micro optics if desired, while the factory SIG X-RAY3 tritium 3-dot sights provide clear day/night visibility. The rear sight is marked 'SIG H3 A1' and the front uses a green tritium dot.
Construction centers on SIG’s modular P365 stainless fire control unit, compatible with the broader P365 FCU ecosystem. The black polymer frame includes a proprietary single-slot SIG micro accessory rail on the dustcover for compatible compact accessories. Slide markings include 'P365' and the stylized 'X', and the frame is marked 'NEWINGTON, NH USA'.
Capacity is 12+1 with the included flush-fit 12-round magazines, giving the XL size a strong balance of capacity and concealability. Overall length is approximately 6.6 in, height 4.8 in, and unloaded weight about 20.7 oz, making it an easy-carry XL-format pistol.




