SIG Sauer® P365XF DH3 RXSL 9×19 / ROMEO-X

The SIG Sauer P365XF DH3 RXSL in 9×19, equipped with the ROMEO-X red dot sight, was developed in collaboration with professional shooter Daniel Horner. It builds on the proven P365 platform in a full-featured configuration focused on speed, recoil control, and competition-ready performance. The slide-integrated expansion chamber paired with a 3.7" barrel reduces muzzle rise and enhances control during rapid strings of fire. A lightweight yet full-size grip module with a 1913 accessory rail and removable magwell gives the pistol a competition-oriented character without unnecessary bulk.

Integrated Expansion Chamber

The slide incorporates an integrated expansion chamber working in conjunction with the 3.7" barrel. This system is engineered to mitigate muzzle rise and improve controllability during dynamic shooting. The design preserves the balance typical of the P365 platform while supporting consistent performance in rapid follow-up shots.

DH3 Slide Configuration

The stainless steel slide features distinctive DH3 serrations and lightening cuts. A Coyote Cerakote finish enhances durability while giving the model its signature appearance. The slide design is both functional and visually distinct from standard P365 variants.

Optics Interface and Sights

The slide is optics-ready using the SIG-LOC compact footprint. The pistol comes factory-equipped with a ROMEO-X red dot sight for rapid target acquisition in dynamic shooting scenarios. XRAY3 day/night sights remain in place to allow co-witness capability across various lighting conditions.

ROMEO-X Red Dot Sight

The included ROMEO-X is designed for direct mounting to the SIG-LOC compact interface. It features a CNC-machined 7075 aluminum housing, a distortion-free aspherical lens, and SIG SAUER’s MOTAC (Motion Activated Illumination) system. The user can select between a 2 MOA dot and a 32 MOA circle. The low deck height allows co-witnessing with standard-height sights, and side battery access enables replacement without removing the optic.

Frame and Ergonomics

The Coyote polymer grip module features a standard 1913 Picatinny rail for accessory mounting and a removable magwell for faster reloads. Interchangeable backstraps (small, medium, and large) allow the shooter to tailor the grip to individual preference. The overall construction remains lightweight while offering full control and shootability.

Magazines and Compatibility

The model is compatible with steel magazines in 17-, 21-, or 10-round configurations, depending on manufacturer specification. This provides flexibility for competition, training, or regulated-capacity environments.

Key Features:

• Slide with integrated expansion chamber
• 3.7" barrel
• DH3-specific serrations and lightening cuts
• Coyote Cerakote finish
• ROMEO-X red dot sight included
• SIG-LOC compact optic-ready interface
• XRAY3 day/night sights
• Polymer grip module with 1913 Picatinny rail
• Removable magwell
• Interchangeable backstraps