Sig Sauer P365X 9mm Micro-Compact, XSeries, Optics-Ready Nitron Slide, XRAY3 Sights, 12+1, 3.1 in Barrel
The Sig Sauer P365X brings the P365 micro-compact platform into the XSeries with an optics-ready stainless slide finished in Nitron, a flat X-Series trigger, and XRAY3 Day/Night sights. This example features the Shield RMSc/ROMEOZero Compact footprint, a 3.1 in barrel, and a 12+1 capacity, with slide markings of Newington, NH USA.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm presents in great shape with minor, superficial handling marks and small blemishes.
What's Included
- 1x 12-round steel magazine with flush base (stamped 'MADE IN USA')
The P365X pairs a micro-compact footprint with XSeries enhancements, including the XSeries grip module and flat-faced X-Series trigger. Its modular stainless-steel fire control unit supports the P365 family’s interchangeability while keeping the package slim and carry-ready.
The stainless slide wears a durable Nitron finish and is factory optics-cut for the Shield RMSc/ROMEOZero Compact footprint, with the optics cover plate installed. Front and rear slide serrations provide a secure grasp for manipulation.
Factory XRAY3 Day/Night sights include a dovetailed steel front blade with a green dot and a steel square-notch rear, offering high-visibility aiming in varied light conditions.
Capacity is 12+1 with the included steel magazine. The black polymer frame integrates SIG’s proprietary single-slot accessory rail. Receiver material is stainless steel, and the pistol is marked NEWINGTON, NH USA and made in the USA.



