Gun Review: Sig Sauer P320 Compact

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If you have been paying attention to the news recently you know that the FBI just selected an unknown Glock as their new sidearm. Shortly after the original solicitation was published many people had the opinion that it was written with the purpose of specifically targeting the Sig Sauer P320 as the obvious choice, when it was passed over I was rather surprised. The P320 has been heralded as a “Glock killer”, I just had to find out if that was fan boys talking or it could be a legitimate claim.

Before we get too far into things, lets take a look at the specs from Sig’s site:

 Caliber 9mm
  Action Type Striker Fired DAO
  Trigger Pull 5.5 – 7.5 lbs
  Overall Length 7.2 in / 183 mm
  Overall Height 5.3 in / 134 mm
  Overall Width 1.4 in / 35.5 mm
  Barrel Length 3.9 in / 99 mm
  Weight w/Mag 25.8 oz / 731 g
  Mag Capacity 15 Rounds
  Sights SIGLITE® Night Sights
  MSRP $628.00-$713.00

The striker fired P320 is a rather handsome gun just like the double action only P250 that fell a bit short at launch several years ago thanks to a less than ideal trigger. The P320 that we have for review is the compact frame in 9mm and has the revised slide stop to prevent shooters that use a thumbs forward method from inadvertently depressing the slide stop. As for the rest of the controls, I found the take down lever to be sized just right even though it looks comically large, the extra leverage is welcome when breaking the pistol down. The magazine button couldn’t be more perfect, Sig located it in exactly the right place and made it the perfect size to allow the shooter to drop the magazine fast while not presenting a problem in a holster.     IMG_3038 IMG_3043IMG_3045

Field stripping the pistol is pretty easily accomplished when you twist the takedown lever down just like almost every Sig handgun ever. Once you turn the lever down it is as easy as removing the slide from the frame, then pulling the dual coil recoil spring assembly and barrel out of the slide.     IMG_3059

Taking a look at the action it is pretty clear that Sig did a really good job of turning the P250 into a solid little striker fired gun. Forgive the dirt, I was too excited to start shooting the gun and put about 350 rounds downrange before realizing I needed to take photos. Oops. IMG_3051

If you pull the takedown lever out of the frame and push up on the trigger you find that the action is a self contained unit. The removable frame is the serialized part so that shooters can buy X-Change kits in other calibers and pistol sizes ranging from a sub-compact all the way to a full sized configuration. Sig also is offering several colors and sizes of grip shells that you can swap out without messing with another 4473. IMG_2950

Sig ships the P320 with a paddle holster, a standard option. I decided to spend some time drawing from a holster to see how well the P320 fell into my hands. Every time I drew the pistol the sights lined right up on target, the trigger fell exactly where you want a trigger to sit on my finger. When I pulled the trigger I was able to land shots on steel with some pretty good regularity making me look like I might know what I was doing.

I was a bit concerned with the chunky slide mass pronouncing the muzzle flip at first but was pleasantly surprised when I wound it to be very manageable. The pistol also does a wonderful job of keeping the recoil at a very manageable level thanks to the dual recoil spring arrangement. Dumping the 15 round mag into my steel target was easy as could be. 1

I handed the pistol over to my friend Scott (who has a pretty awesome gun related Podcast you should check out) so that he, the ultimate Glock fanboy, could give it a go. After several magazines Scott said that he liked it a lot and wants to see the long term reliability. There might be a chance in hell to convert the guy that knocks on my door Saturday morning to tell me about his lord and savior Gaston Glock after all! 3

I loaded the mag up with some Sig Sauer ammo and stood at the 7 yard line, I couldn’t think of a more appropriate use for the ammo. After shooting a couple groups that all look just about the same I was pretty pleased with the results. Yet again I had a reasonably good range day and was able to produce several really good groups.   IMG_2883 IMG_2945

So what do I think about the P320 after feeding it right around 1050 rounds on range day 1 and another 350 on the second range day? I am in love and look forward to really pushing the P320 to the limit of what it is capable of. I think the photo below should say it all, although there is a small re-homing fee for some of them. Did the P320 prove to be a possible Glock killer? I think as soon as the US police market gives it a solid chance it has everything it needs to displace the king of modern sidearms. IMG_3096

The MSRP of the P320 Compact as tested is $628 to $713 depending on options. I have seen the street price as low as the $420 range recently. If you would like to learn more about the features and different configurations of the P320 click HERE for Sig Sauer’s website.



Patrick R

Patrick is a Senior Writer for The Firearm Blog and works in the shooting sports industry. He is an avid recreational shooter and a verified gun nerd. With a lifelong passion for shooting, he has a love for all types of firearms, especially handguns and the AR-15 platform. Patrick may be contacted at tfbpatrick@gmail.com.

The above post is my opinion and does not reflect the views of any company or organization.


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  • Gary Kirk

    I’ll take the whole box..

    • Gary Kirk

      Oh, and thanks for the review. Have been interested in the 320 for awhile now, like the modular design. Might just get me to go through the b.s. to buy another handgun in my wonderful state of MD.. That, and the box you’re going to send me.. Heheh

  • Aono

    Any word on a .380 version? Sig ships magazines labeled for the P250/320, but still no 320 in .380. It seems like there would be demand for a striker-fired, double-stack, locked breech! .380 especially since we now have a pretty good idea which loads would pass FBI muster. The locked breech and weaker recoil spring (compared to 9mm) means smaller-statured shooters would be more likely to choose it over a .38 revolver. And don’t forget the RDS – which also makes it easier to rack.

    Maybe it’s because the Sig .380 ammo sucks and they might want to fix that first?

    • Tom

      Is there really a market for a .380 the same size as a 9mm Luger? Sure there have been improvements in .380 and sure it would benefit from a locked breech and all but there just does not seem to be much of a market for it, no one else seems to be in a rush to produce a double stacked locked breech .380.

      • Richard

        The market for a .380 pistol the sameish size as a 9mm pistol would mostly be for countries where you can’t own a handgun in a caliber used currently by a/the military/law enforcement.

        • Tom

          The problem I see is that in Europe the 9x21mm is much more popular where shooters need to get around the no military calibre thing (i.e. Italy) and as there is [essentially] no ccw then its a range gun so why use under powered .380? As for S. America would the Sig be at price point to compete with Taurus etc.

      • Aono

        I was really just circumscribing that it would be great for women. If you build it they will come and all that. Why not take on the Browning 1911-380?

      • Ryobiwankenobi

        I could see a full size 380 being useful for the person who already has a subcompact 380 for concealed carry and wants a full size pistol for home defense without having to purchase a different caliber. It could also be useful for the extremely recoil sensitive shooter as well.

  • Richard

    I went to a gun store in Tampa the other day and they had kits for this gun. I’m thinking of buying one just for the modularity if not anything else.

  • sean

    Glock Killer?! BAHAHAHA!! Calm down, Sigs crappy plastic and finish isn’t going to do anything to Glock.

    • Kelly Jackson

      I’ll take “crappy finish” over Glock’s garbage trigger any day of the week.

      • mlk18

        @sean has obviously never fired a P320. It’s like a Glock gen7.

        • AirborneSoldier

          How so? Genuinely curious.

          • Peter

            In my opinion, the stock triggers of both the Glock 17 and Glock 19s I have shot have been spongy and mediocre. I also dislike the trigger bar drop safety tab on Glocks, which are unnecessary to make the P320 drop safe because of the design.

            If there is one good thing I can say about stock Glock triggers, is that they have a fairly positive reset. But the reset of the P320 trigger is more positive still.

            As for crappy plastic, how about those crap plastic sights that come stock on Glocks? Some have complained that the plastic grip module of the P320s is more easily scratched up. I own two P320s and have not found that to be the case. But if they do get scratched up, grip modules on P320s can be replaced for about $35 if you shop around a little.

            As for spending extra money on a SIG compared to a Glock, that is certainly true for the classic P series SIGs, but not for the P320. I bought a NIB full-size P320 .45 ACP with night sights for under $500, and a NIB compact P320 9mm with contrast sights for under $450. The cheapest Gen4 Glock 19 I could find (with crap stock plastic sights) was $500, although the G19 did come with one additional magazine.

    • Gregory

      Here we go again, the “my gun is better than your gun” crap. The best gun is the one that is reliable, will not break, will not wear out, you are comfortable with and you can hit the target with. Both are good and one or the other will satisfy the requirements.

      • sean

        My everyday carry is a 226 legion, I have a couple glocks but use them mostly for the 10mm, and also have a couple 1911s and revolvers. My comment is more based on that people think that a single Sig strikefire will do anything to Glock and their foothold in the gun industry

        • Hey Sean, you “responded” (rebuttal) in a much different manner than you “reacted” (initial statement). “Calm Down” seems slightly misdirected, but glad to see you did.

    • AGS113

      Except for the fact that Glocks are absurdly boring, common as all hell, and can’t even compare to the quality of a Sig. If any gun has “crappy plastic” it’s a Glock, without a sliver of doubt. People love Glocks bc they’re reliable and wonderful to shoot. But cheap too. That extra money you spend on a Sig is represented full well in the quality they apply to their guns. The P320 is by FAR not their best model, but a wonderful one anyways. Definitely comparable to a mediocre Glock.

  • Joe

    IMO, SIG hit a home run. Awesome trigger, factory night sights, modularity, reliability (so far), all for lower than a GLOCK (got mine for $499).

  • Vhyrus

    Why do the slide stops on your P320 look different from my P320?

    • Kelly Jackson

      Read the article, that’s the replacement.

    • Patrick R. – Staff Writer

      The P320 that we have for review is the compact frame in 9mm and has the revised slide stop to prevent shooters that use a thumbs forward method from inadvertently depressing the slide stop.

  • The P320 is easily one of the best and most useful concepts to hit handguns since the advent of the polymer frame– so much so that I fully expect the other major manufacturers to come out with modular systems just as soon as they can figure out how to duck and weave around SIG’s patents– but googaly moogaly SIG makes nothin’ but tugboat-ugly handguns.

    • AD

      I really liked the aesthetics of the P250, but that’s about the only Sig I liked the look of. I don’t like the P320 slide, and I don’t think it looks very good on a P250 grip (I think it’s shared between the two models?) seeing as it’s striker fired but the beavertail is styled for something with a hammer..

  • Pete – TFB Writer

    Love that last pic!

  • LIBERTEAPARTY

    A review that doesn’t mention trigger pull or action type? DAO? DA/SA? striker-fired? What kind of sights? Round capacity?

    • Patrick R. – Staff Writer

      Sorry about that, I must have overlooked including the specs from Sig.

      • Rick Kirkpatrick

        Lol! An excellent display of restraint, Patrick.

  • CJ Klekar

    I’ve been packing the Sig P320 full-size for almost a year now as my on-duty gun. It really surprised me regarding the accuracy and the trigger crispness. My G17 has been relegated to the role of safe queen. Been looking at the Sig P320 sub-compact for the role of off-duty…G2G in IMHO!!!

  • cwolf

    Once the reliability, accuracy, and user testing is done, folks buying xx,000 guns look at acquisition and life cycle support & costs. It would be very difficult for a $600-$700 gun to compete.

  • M&M’s

    Glock killer? It failed at the FBI and NJSP!

  • BigFED

    I have two of them in the Carry model, one a 9mm the other with a .357SIG and a .40SW barrel! Almost exclusively my EDC. P938 when I have to be more discrete!

  • AirborneSoldier

    Nice review. Ill stick to my p250 for edc, and my other sigs for occasional. Love my p250 trigger.

  • Chris Miller

    Honestly, I’ll pass on this as I don’t care for striker-fired guns for my go-to guns. If I was to go with this branch of the Sig handgun tree, I’d stick with the P250. It has one of the smoothest DAO triggers I’ve ever felt, and I have no issues with the long trigger pull (most of that travel has little to no pull weight). That said, the modularity thing is a moot point as I would only use the Carry/ Compact size anyway. At the end of the day though ,I still prefer my DA/ SA Sig P220 (or my P245 for when I need a gun with a smaller footprint) and will continue to carry that as my EDC. I do occasionally rotate my 1911’s into the rotation for special occasions (Independence Day, or black-tie affairs).

  • pblanc

    Good review. Glocks are fine pistols for many, but they have never worked well for me. The grip angle, unlike any of the pistols I own, causes them to point unnaturally for me. The somewhat exaggerated palm swell on the back strap and the flat sides on the grip make them uncomfortable for me to hold. And the finger grooves on the Gen3 and Gen 4 Glocks made things even worse. The G17 finger grooves are not too bad. But the G19 also has three finger grooves on a shorter grip. So does this mean that people’s fingers shrink when they go from a duty size to a compact size pistol? Or that the G19 is only intended for people with thinner fingers?

    The P320 medium grip module feels as if it was molded to my hand. The pistol points very naturally and the sights come back on line quickly after recoil. The trigger is much better than the stock trigger on either the G17 or G19. And the steel contrast or SIGLITE night sights are a vast improvement over the mediocre plastic Glock sights.