SIG Pro-Cut Slide: 7D Chess Move?

Something wicked this way comes

Sig Sauer is making some big moves to dominate the polymer pistol market, which either denotes genius from the outset or an unrivaled ability to adapt on the fly. Or maybe a bit of both. Of course, we are talking about the P320 family in this case, as the P365 is already in a near unrivaled class of its own for the smaller guns.

Magnificent new accessory

We are talking this week about what could be termed an accessory part, but to give it a proper shake out, we have to look at the overall lay of the land. If you were Sig 5 years ago, and you desired to become the new King of Polymer, what would the battlefield look like? It would be pretty grim. The Glock dynasty would look like the Roman Legions backed up by the British Navy, in a time that the best an enemy could muster against them was Bronze Age swords and paper Mache armor. I mean, the dominance of Glock in the market space was absolutely unquestioned. Smith and Wesson had created arguably a better firearm (M&P, and especially M&P 2.0), and eeked out a small percentage for themselves, but it was like a toe hold instead of a beachhead.

Turning an X5 into an X Carry in less than a minute

The Glock juggernaut looked absolutely unstoppable. Even as late as 2018, with M&P doing its best for 10 years plus, Glock owned 65% of the US handgun space, and upwards of 80% of Law Enforcement space. Those are absolutely staggering numbers. From about 2005 forward, you could see this reflected in the trickle-down industries as well. If you made an aftermarket part, it better go on a Glock. First run of a new holster design? Glock. It affected so much that even things like a Surefire flashlight had Glock rail as the default setting out of the box.

Lightening cuts

If you wanted to take over this space, what would you do? And I don’t mean carve yourself a little niche. Lots of companies did that, some of them are even still around. Make a better gun? Arguably, the M&P, XDM, and CZP10 are all better performers. They didn’t make a dent. Make a cheaper but just as good gun? Best of luck. Glock raised prices starting around 2015, and didn’t lose sale one. Do some great marketing? Ask Hudson Arms how that went.

Bull nose front

So what kind of a madman would enact a plan not just to put out a gun that would survive, but that would absolutely dominate the space? Ron Cohen apparently, from Sig Sauer, New Hampshire. And from my look at the crystal ball, it is absolutely going to work.

Sig Night Sights pre-installed

Step one was securing the new Army pistol in 2017. No small feat, but at least it is a level playing field. LE purchases aren’t controlled by Congressional mandate, so you can do all kinds of things to win with LE. And while the DOD procurement system does have problems, you can’t rig their contest by having strippers in your booth or donating to the Mayor’s re-election fund. Others have written plenty about the P320 winning the DOD contracts, and while it was important, it isn’t really our focus today.

Step one was important because it assured the P320 would have secondary market support. Holsters, lights, all that stuff- because of the contract, it was assured 400,000 P320’s would be made at a minimum. As an aftermarket manufacturer, that will get your attention.

Add ons if going to a shorter slide

Step 2 is where we are now. Sig is embracing the concept of both aftermarket major parts and in-house-built performance parts in a way no one has ever done. The introduction of the SIG Pro-Cut slides cannot be overstated as to how it changes the game. To this day, can you buy just a slide or just a frame from Glock or Smith and Wesson? You cannot. Sig has always offered you both a Caliber exchange kit, or a new frame, at a pretty reasonable price. And now? How about a custom-looking slide that you know had input from the stable of gunslingers Sig has on staff, that doesn’t void your warranty?

All internals also included

The Pro Cut slide is not only a work of art, though the pictures in this article say it is that too. But it is a value, at least to the intended customer. $400 for a slide might not sound cheap compared to the base price of an entire P320 at $579.00. But for the guys that are really into customization, this one is a steal.

Red dot ready

To put it in perspective, how would you match this in a different brand of gun? Most likely, you would send your slide off to a custom shop. They would mill it out, cut a Red Dot attachment into the top, and refinish it for you. Which in most cases, is going to cost well more than $400. Oh, you would just buy an aftermarket slide? From any reputable company, that is going to be about $450 at a minimum. Before you buy slide internals and sights.

Compared to X5 slide

The Sig Pro-Cut, for that $400, comes out of the box ready. The firing pin, back plate, night sights, everything. Drop in your barrel and recoil spring, put it on your frame, and you are ready to get some.

For me personally, this also represents a great travesty being corrected. Of all the guns I have ever reviewed, I regret not buying the X-Carry the most. (Writers often have the option of buying our review guns. If for no other reason, they are used after we test them. And if you have a reputation, such as myself, for not treating them like a princess? Then they are really used.) Now I can build one myself, with ease, using my X5 trigger group.

Hornady test ammo

The Sig Pro-Cuts are available in 3.6, 3.9, and 4.7-inch lengths so far which cover almost all of the bases. They’re available in either black, FDE, or a bead blasted stainless finish. The stainless is perfect for either an absolutely unique two-tone finish or if you already have custom Cerakote plans.

Tested with Volund Gear Works battle belt

This is going to be a huge development. If you started with a base model P320, and want to slowly build it up? Covered. As long as you are sticking to the same slide length as before, all you need is the slide. Maybe toss an X-Grip module on later for the stunning price of $59.99. Oh, you wanted to get real gangster? How about your new Pro-Cut slide on an AXG aluminum grip? And not to mention the promise of things to come. While the Pro-Cut slides are 9mm only right now, it is easy to see they will be in other calibers later. How about a full-length Pro Cut on an X5 Legion frame in 40 S&W for USPSA? Or an X-Compact in 357 Sig?

The sky is the limit with the first truly modular handgun, and the Pro-Cut slides are an important milestone in development. We are going to see big things from the P320 series. And I can’t wait to see what components come out next.

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About the author: Clay Martin is a former Marine and Green Beret, retiring out of 3rd Special Forces Group. He is a multi-decade and -service sniper, as well as 3-Gun competitor and Master ranked shooter in USPSA Production. In addition to writing about guns, he is the author of “Last Son of The War God,” a novel about shooting people that deserve it. You can also follow him on twitter, @offthe_res or his website,

{ 10 comments… add one }
  • smash karts July 24, 2021, 2:18 am

    On the Pro-Cut slide that I purchased for my P320 V-Tac, I did add the DPP red dot. But first, I weighed it, and it turned out to be heavier than the factory one!!! That disappointed me, although it appeared to be fun.

  • Kane March 19, 2021, 11:27 am

    I have a P-320 (compact) already but the module includes an ambi safety. I ride my thumb on the safety lever so I do NOT forget to disengage the safety. I suppose I could buy the other cool slides and hope that a gunsmith could cut out an appropriate slot to accompany the ambi safety but it would be better if SIG offered these same upgrades for all SIG modules. Sometime back I questioned a SIG rep on the phone about this issue and I sensed that SIG is taking another page out of Glocks playbook and has a disdain for firearms with the safety, the local laws and military requirements not withstanding.

    • Kane March 19, 2021, 2:16 pm

      I suppose I should have stated that any cutting would be on the lower receiver and NOT the slide or upper receiver.

    • Pistolero March 19, 2021, 2:21 pm

      P320 slide assemblies work without any problem on 320 fire control units that include a manual safety. I bought a new slide and put it on my P320-M17. No issues.

      • Kane March 19, 2021, 9:04 pm

        Thanks for the info. I guess the 3.9 PRO-CUT Slide Assembly is compatible with the P320 9mm Compact barrel and spring and the 4.7 is compatible with the P320 9mm full size.

  • CW March 15, 2021, 9:17 pm

    I did put the DPP red dot on the Pro-Cut slide that I got for my P320 V-Tac. But before I did, I weighed it, only to discover that it was heavier than the stock one!!! I was disappointed about that, but it looked cool😳🙄

  • Robert L Zelner March 15, 2021, 10:29 am

    IT still does not come in .45 To bad.

    • Jake March 15, 2021, 3:34 pm

      They make a .45 but not X-Five and the parts don’t swap between the 9/40 etc.
      The best .45 polymer striker fire I have handled by far is the Ruger American. Mild recoil similar to 9mm. 4 lb. trigger, great Novak sights. 1911 muscle memory.
      Best polymer .45 ever, the internal hammer fired HK P9S Sport Group 3.

  • Joh March 14, 2021, 5:18 pm

    Too bad it’s red dot ready for only the Sig products and DPP. Slapping on a plate isn’t ideal. I looked hard at this but went with an aftermarket instead. RMR/SRO ready.

    • James March 15, 2021, 8:30 am

      Look at the CHPWS plates for P320 they replace and are as thin as the RMR sealing plate you need anyway. SIG drills and Taps holes for the RMR screws now so the plates can be super thin.

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