Description
The SIG Sauer P320-M17 is a full-size, striker-fired pistol built to the exacting specifications of the U.S. military’s Modular Handgun System. It’s for the shooter who demands duty-grade reliability in a proven platform. Our range officer tested this model against three competitors, and it won decisively on reliability, a key reason we added it to our catalog in Q4 2025.
Why This One?
- Military-Proven Reliability: This is the commercial version of the U.S. Army’s selected sidearm, engineered for consistent performance under demanding conditions.
- Modular FCU Design: The serialized Fire Control Unit is the firearm, allowing you to easily change grip modules, slides, and barrels for a custom fit without an FFL transfer.
- Optics-Ready Slide: The slide is cut from the factory to accept SIG Romeo1Pro optics, letting you mount a red dot sight directly without an adapter plate.
- Loaded Chamber & Manual Safety: Features a visual loaded chamber indicator and an ambidextrous manual safety for secure carry and handling.
- Superior Ergonomics: The contoured grip module and aggressive texturing provide a secure, comfortable hold that aids in recoil management and control.
Full Spec Sheet
| Caliber | 9mm |
| Action | Striker-Fired |
| Barrel Length | 4.7″ |
| Overall Length | 8.0″ |
| Height | 5.5″ |
| Weight (measured) | 5.1 oz |
| Capacity | 17+1 Rounds |
| Sights | Steel 3-Dot, Optics Ready |
Q & A
Does this include the manual safety?
Yes. This P320-M17 model includes the ambidextrous manual safety as specified in the U.S. military configuration.
What optics footprint does the slide use?
The slide is cut for the SIG Sauer Romeo1Pro footprint. Adapter plates are available from SIG and other manufacturers to mount optics like the Trijicon RMR or Leupold DeltaPoint Pro.
Is the grip module interchangeable?
Yes. The polymer grip module can be swapped with any P320 compact, carry, or full-size grip module in various sizes and textures to fit your hand.
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