Upgrade your compatible SIG SAUER P320 with the M17 Slide and ROMEO-M17 Optic Assembly. Based on the slide and optic configuration selected for the U.S. Military's M17 service pistol, this factory-equipped assembly combines a durable Black PVD stainless steel slide with an installed ROMEO-M17 enclosed red dot optic.

The ROMEO-M17 features SIG SAUER's proprietary SIG-LOC mounting system, engineered for secure optic retention and a stable mounting interface. Its fully enclosed optical design is sealed and purged to help protect against environmental exposure. The low-deck-height configuration allows absolute co-witness with compatible standard-height sights.

The optic offers 15 brightness settings, including three settings optimized for Gen 3+ night vision. Shooters can select from three reticle presentations: circle only, dot only, or a circle-and-dot combination. The side-mounted CR2032 battery provides up to 50,000 hours of operation at medium brightness.

Additional ROMEO-M17 technologies include MOTAC™ (Motion Activated Illumination), MAGNETAC™ (Magnetic Activation), and D.A.R.C. (Dark Adaptive Reticles & Coatings). Factory-installed SIGLITE front and rear sights provide an additional sighting option.

Key Features

• Factory-installed ROMEO-M17 enclosed optic
• Proprietary SIG-LOC optic mounting system
• Sealed and purged enclosed optical design
• Low deck height for absolute co-witness with compatible standard-height sights
• 15 illumination settings, including 3 Gen 3+ night-vision settings
• Three reticle options: circle, dot, or circle-and-dot combination
• 2 MOA center dot with 32 MOA circle reticle
• Up to 50,000 hours of battery life at medium brightness
• Side-mounted CR2032 battery compartment
• MOTAC™, MAGNETAC™, and D.A.R.C. technologies
• Factory-installed SIGLITE front and rear sights
• Black PVD stainless steel slide construction

Compatibility and Installation

This slide assembly is designed for compatible SIG SAUER P320 Carry and Compact configurations and supports both manual-safety and non-manual-safety Fire Control Units (FCUs). The assembly features a tool-free slide swap design.

Compatible FCU calibers: 9mm, .357 SIG, and .40 S&W. This assembly will not function with .45 ACP or 10mm FCUs.

Important Compatibility Notice

• Not compatible with .45 ACP or 10mm Fire Control Units.
• Will not work with SKU M17-COMMEMORATIVE, M17-EMP, or M17-EMP-10.
• Barrel and recoil assembly are not included.
• Verify your P320 model, FCU caliber, and compatibility before ordering.