SIG SAUER P320 M18X 9mm Luger Pistol with RomeoM17 Red Dot Sight.

The SIG SAUER P320-M18X with Romeo-M17 Red Dot Sight is a modern, modular striker-fired pistol designed for military, law enforcement, and civilian use. It’s an upgraded version of the M17, ‎

Specifications & Details

Pistol: SIG SAUER P320-M18X (9mm Luger)

• Action: Striker-fired
• Caliber: 9mm Luger
• Capacity:
  • Standard: 17+1 rounds (with full-size magazine)
  • Optional: 21-round extended magazines available
• Barrel Length: ~4.7″ (M18X variant, slightly longer than standard M18)
• Overall Length: ~8.5″
• Height: ~5.5″
• Width: ~1.3″
• Weight (Unloaded): ~30 oz (with magazine)
• Frame: Polymer, modular (interchangeable grip modules)
• Slide: Stainless steel, Nitron-coated (optics-ready)
• Sights:
  • Co-witnessing suppressor-height iron sights
  • Pre-installed SIG ROMEO-M17 red dot sight
• Trigger: Flat-faced, ~5.5–6 lb pull (crisp break, short reset)
• Safety Features:
  • Manual thumb safety (optional)
  • Striker safety & disconnect safety
• Rail: MIL-STD-1913 Picatinny (for lights/lasers)

Optic: SIG ROMEO-M17 Red Dot Sight

• Type: Closed-emitter (similar to Romeo2)
• Reticle: 3 MOA dot
• Brightness Settings: Adjustable (10+ levels)
• Battery Life: ~20,000+ hours (motion-activated)
• Housing: Durable aluminum
• Mounting: Direct M17/M18 footprint (no adapter needed)
• Waterproof: IPX-7 rated (submersible)
• Shockproof: Rated for pistol recoil

Key Benefits

1. Military-Grade Reliability – Based on the U.S. Army’s M17/M18, tested for extreme conditions.
2. Modular Design – Swap grip modules for different hand sizes or mission needs.
3. Optics-Ready – Comes with a Romeo-M17 red dot, enhancing accuracy and target acquisition.
4. High Capacity – 17+1 standard (21-round mags available).
5. Improved Ergonomics – Aggressive grip texture, balanced weight.
6. Durable Finish – Nitron-coated slide resists corrosion.
7. Closed-Emitter Optic – Romeo-M17 is dust/debris-resistant (unlike open-emitter dots).
8. Flat Trigger – Smoother, more consistent pull.
9. Picatinny Rail – Mount lights/lasers easily.
10. Civilian Legal – Available to the public (unlike select-fire military variants).

Ideal For

• Home Defense – High capacity, optic-assisted accuracy.
• Duty/Law Enforcement – Proven military reliability.
• Competition Shooting – Fast follow-up shots with red dot.
• Concealed Carry (for some users) – Compact enough with the right holster.

Conclusion

The SIG P320-M18X with Romeo-M17 is a top-tier handgun combining military heritage, modern optics, and modular flexibility. Its closed-emitter red dot and enhanced ergonomics make it a standout choice for shooters who demand performance and adaptability.