SIG Sauer P365X 365X-9-BXR3-RXX | 9mm | 3.1″

The SIG Sauer P365X (model 365X-9-BXR3-RXX) is a sub-compact, striker-fired pistol chambered in 9mm with a 3.1-inch barrel and an installed Romeo‑X Compact red dot. The pistol ships with the XSeries P365 grip module, XRay3 day/night sights and two 12-round removable magazines. For users who prefer an alternate optic, the factory-installed SIG Romeo‑X Compact is a suitable red-dot option under $1000 that maintains the pistol’s low-profile slide footprint.

Product Specifications

• The UPC is 798681689385.
• The manufacturer part number is 365X-9-BXR3-RXX.
• The model is the P365X.
• The cartridge is 9mm.
• The barrel measures 3.1 inches.
• The overall length is 6 inches.
• The standard magazine capacity is 12 rounds.
• The pistol includes 2 x 12-round removable magazines.
• The pistol includes an installed Romeo‑X Compact red-dot optic.
• The optic footprint is SHIELD/RMSc.
• The slide material is stainless steel with a Nitron finish.
• The grip module is the XSeries polymer grip with integrated carry magwell and extended beavertail.
• The trigger is the XSeries flat striker-fired trigger with a 90-degree break.
• The sights are XRay3 day/night sights in a rear dovetail configuration.

The P365X balances concealability with higher-capacity ergonomics through the XSeries grip and included 12-round magazines. Its optic-ready slide and compact footprint make it suitable for everyday concealed carry and for focused range practice or carry-sport training where a low-profile red dot aids rapid sight acquisition. The package’s combination of factory optic, XSeries controls and night-capable sights supports practical, real-world use without additional modification.

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