SIG SAUER P320 Pistol In 9mm, .357 SIG & .40 S&W

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The SIG P320 is SIG SAUER newest modular double-action striker-fired pistol. The P320 has been designed primarily with one thing in mind: convince law enforcement organizations to buy it. At the heart of the SIG P320 is the internal stainless steel frame assembly. The assembly houses the trigger group and contains the firearm’s serial number. Legally speaking, the internal assembly is the firearm. The frame assembly drops into one of three grip modules. The polymer grip modules (what we would normally call the ‘frame’ if they were serialized) vary in grip circumference (a small, medium and large). The grip module contains a cut out so the assembly serial number can be seen externally.

There are two barrel sizes, each being available in a threaded or non-threaded variant. The barrel lengths are 4.7″ for the Full Size model, and 3.9″ for the Carry (compact) model. Two slide assemblies are available in either the Full Size or Carry size. Two triggers are available, a standard trigger and a tabbed safety trigger (think Glock-style trigger). They both break at 5.5 lbs. The magazine capacities are 17/15 rounds of 9mm and 14/13 rounds of .357 SIG and .40 S&W for the Full Size/Carry magazines.

Steel internal frame can be seen inside  polymer grip.

Steel internal frame can be seen inside polymer grip.

The most heavily marketed feature of this gun is the “5-point safety system”. The five points are …

  • A striker safety.
  • A disconnect safety.
  • Takedown is prohibited without removal of magazine.
  • Takedown is prohibited without the slide being locked back to the rear.
  • Rotation of takedown lever without tools or trigger manipulation.

Other safety featured touted are …

  • Tabbed trigger safety (optional)
  • Ambidextrous manual safety
  • Loaded chamber indicator
  • Magazine disconnect safety

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Not all of these features will are demanded, or will be appreciated, by consumers but should be very popular with law enforcement organizations looking to limit liability (and who don’t want to spend money on better firearm training).

SIG are selling both the full size and carry models for $713. At the moment no size/caliber conversion kits are listed on their website, but I am sure these will be made available in time.

Photo © Bryan Jones

Photo © Bryan Jones

Photo © Bryan Jones

Photo © Bryan Jones

Photo © Bryan Jones

Photo © Bryan Jones

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Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


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  • William

    What’s difference between this and a p250?

    • gogetgunz

      p250 is hammer fired . . . this is striker fired

      • NraInstructor

        No shit gogetgives, that’s the difference. The striker fired system gives the firearm a shorter crisper trigger pull. Which is the reason the p250 didn’t sell well

    • FourString

      The trigger pull on the P250 is also a lot heavier, I think. Like, reaaaally heavy since it’s a DAO hammer fired system. I think that made it pretty unpopular among civvies

  • Marcus

    Any chance of a conversion kit for a P250 into this? I wouldn’t mind switching mine. I absolutely love the gun(.45 compact), but with my limited resources, I am tempted to trade it in for something slimmer or more versatile otherwise.

  • Don’t Drone Me Bro

    Perhaps SIG hasn’t heard, but companies in the 21st century make their handguns with replaceable/adjustable backstraps and/or side panels.

  • The-Big-I-Am

    Is it just me or does the slide release look like it is too far back?

  • Cooulguy

    Did the P250 even sell well? Why would this?

  • hod0r

    Would be a seller with a redesigned grip for lower bore axis and interchangeable backstraps. I don’t see me buying as is.

  • FourString

    Oh interesting, the manual safety option, didn’t know about that. Well that’s kind of different (than Glock at least)

    Tbh, kind of interested enough to anticipate shooting impressions.

  • TexasRaider

    There it is…the feral cry of the Kool Kids, the hollow scream of “Lower the bore axis! The bore axis is too high! Bore axis! Bore axis!”, which is arguably the single most overrated and virtually insignificant aspect of handgun design you can find. When you can’t hide multiple kB!’, crappy front sights, grip angles designed for a species other than humans, paper thin guide rods and unsupported chambers that leave smiley faces on your brass, well just scream “Bore Axis!” loud enough and folks might forget that ugly, black soap bar of a handgun really isn’t “perfection” after all.
    And yeah, bore axis height is why the Navy Seals, US Coastguard, the
    DEA, US Air Marshals, Texas Rangers, NYPD, the British SAS and the US Army, amongst hundreds of others, use Sig pistols…they’re all so profoundly stupid and uninformed regarding firearms design and use that they didn’t know enough to throw themselves on the polymer alter of the Austrian Plastic God while singing the hymn ‘How Great Thy Bore Axis Art’…..