Sig MPX Vs CZ Scorpion

Specification Comparison and Reviews



Sig MPX Vs CZ Scorpion

Specification Comparison and Reviews

The Sig Sauer MPX and the Česká zbrojovka (CZ) scorpion pistols are both 9mm submachine guns (SMG’s). The Sig is a closed bolt system, while the CZ is an open bolt. The Sig is also blowback-operated while the CZ is delayed blowback. There are many factors to consider when comparing Sig MPX vs CZ Scorpion.

Table of Contents

Concerning ergonomics, handling, and accuracy, there is little difference between these two weapons. Which one you choose will depend on how essential aesthetics and caliber are to your particular needs. Here we will do a comprehensive analysis of  Sig MPX vs CZ Scorpion.

Introduction of Sig MPX

The MPX comes in two separate models: the MPX and the MPX-P, which stands for Pistole (automatic pistol) Parabellum (Latin translation for prepare for war). The main difference is that the MPX comes with a Sig proprietary barrel and has a quad rail instead of Picatinny rails. Both weapons come in black and flat dark earth brown color schemes.

Introduction of CZ Scorpion

The Scorpion comes in both 9mm and .40 caliber and has Picatinny rails, most significantly making more added polymer foregrip, and a replacement grip that allows you to choose between using it as either a pistol or a pistol folded SMG. It also uses either Glock or CZ magazines, depending on your exact model. The Scorpion comes in matte black, olive drab, and flat dark earth brown color schemes.

Features of Sig MPX Vs CZ Scorpion

The staple firearm debate of recent years is that of the AR15 vs. AK47. The two firearms are similar in design, with both sporting 30 round magazines and quick-change barrels. For decades now, fans of each manufacture have flocked to either side like die-hard sports fans regarding which was superior. Many manufacturers continue developing versions of one or both guns; Sig Sauer has developed a weapon that takes elements from both rifle designs into one package. By taking the best points of both rifles and merging them into one. Sig has created the MPX.


However, the MPX is an excellent design with many benefits and features. The CZ Scorpion EVO S took the same parts of the original Scorpion submachine gun and adapted them for this new platform. It has a folding arm brace that is designed to assist in controlling muzzle climb. It also comes with 3 Picatinny rails that allow you to attach just about any accessory on the market. Which one should you choose? The answer isn’t necessarily easy considering that they are both great weapons, but here are some things to consider when making your decision.

Ease of Use

Which weapon is easier to use? The MPX’s charging handles are on either side of the gun, making it easier to manipulate for people of all sizes. The Sig is also simpler to disassemble and clean due to its short-stroke design. However, cleaning the Scorpion isn’t all that difficult either.

Scoring (Rate of Fire)

They both have a cyclic rate of fire between 1,000 to 1,300 rounds per minute, making them both very controllable, especially when compared with other Sub-Machine Guns. When it comes down to this category, it’s just personal preference about how much firepower you want at your disposal.

Size and Weight

The MPX is lighter at 6 lbs, whereas the Scorpion weighs 7lbs.

Sig MPX Size and Weight

You should consider this if you are going to be carrying this piece around for prolonged periods because while they are roughly the same size, the weight will impact whether or not this weapon is comfortable to hold.

CZ Scorpion Size and Weight

Magazine Capacity

The MPX has a greater magazine capacity at 30+1 rounds. Whereas the Scorpion only holds 30 + 1 in 9MM form and 32 + 1 in .40 caliber.


As you might imagine, the MPX has a significantly lower profile than the Scorpion EVO S. This means it can be concealed more quickly, but this will depend on your clothing style and build. If you plan on taking either of these out in public often, then hiding them would be an essential factor to consider during your purchase.

Ease of Accessorizing 

Even though many Carbine enthusiasts may dislike mounting accessories onto their rifles, optics are still extremely useful if incorporated correctly into any weapon system. Both firearms come with top Picatinny rails. The MPX also comes with a side and bottom rail, allowing for more accessories than you can add. This feature makes it incredibly easy to attach optics, grips, lights, and lasers, which is always a plus on any firearm platform.


If you plan to use either of these weapons for home defense or carry them concealed daily, gun caliber choice becomes extremely important. Both firearms come in 9mm, but the Scorpion takes things one step further by offering .40 S&W as an option as well. By choosing the most significant caliber that your state allows guarantees that you can use your weapon safely at home or on the street if needed.


While both guns are highly reliable, the Scorpion seems to be just that little bit more so than its AR-15 counterpart. The Sig MPX tends to jam a lot more often than the CZ Scorpion for one reason or another. Even when new out of the box, it did not seem to run without constant jams and stovepipes.


The price tag on either of these guns is over $1000, which can be extremely expensive for someone looking for their first rifle or even an upgrade from one they currently already own. If you are looking at both of these firearms with the intent of using them regularly, then spending that kind of money might not be such a bad idea, but if you only use them every once in a while, it may be best to go for a cheaper option. The MPX is more expensive than the Scorpion. The base model for the MPX costs $2,197, whereas the base model for the Scorpion will only cost you $1,099.


However, if you are looking to get this gun in .40 caliber, it bumps up to $1,299, making it a much less expensive competitor because the 9MM version of the Scorpion only costs $999. The CZ Scorpion Evo 3 S1 wins out on price at around $800. However, there are many drawbacks to having such a strong recoil for this price. Even though the gun is very reliable, it cannot be easily upgraded to take many accessories or targeting equipment.


The MPX, on the other hand, is made with an all-aluminum alloy which makes it lighter, but it’s also more expensive at around $2000-3000. Which is better? Unfortunately, neither gun is necessarily better than the other, and in the end, it will come down to personal preference. However, if you are in a position where you can afford either one, then the CZ Scorpion EVO S is more reliable when compared side by side to its Sig counterpart. Whether this is enough to justify paying an extra $300-400 dollars comes down to whether or not that reliability difference matters to you.

Customization of CZ Scorpion Vs Sig MPX

The CZ Scorpion Evo 3 S1 is a 9mm blowback rifle designed to compete with more expensive AR15 and AK47 rifles. However, the major downside to having such a strong recoil is that it cannot take nearly as many accessories or much in the way of aftermarket upgrades, causing it to be less customizable than other guns in its class. It offers high-velocity rounds made by ammunition manufacturers specifically for this firearm, making finding ammo on store shelves attainable. If you want something more modern-looking, then you’re not going to find it here.


The MPX, on the other hand, is very customizable because it borrows heavily from the AR15 design. It uses STANAG magazines meaning you can use AR15 parts for this gun. It also features three different configurable charging handles, two interchangeable rear stocks, folding front sights, and much more. The MPX is made with an aluminum upper receiver with a monolithic top rail allowing you to mount any accessories or optics of your choosing. This gun is only offered in 9mm, which means it does not have as high-velocity rounds as the Scorpion Evo 3 S1, but it does weigh less than the Scorpion.

Local and International Shipping

One of the most significant factors you should consider for this gun is where you’re buying it from. Since Sig Sauer is a US-based company, if there are any issues with the weapon, they will cover all repairs and shipping to have your firearm brought back up to working condition. If you purchase this gun from an overseas manufacturer, you may be stuck having repairs done yourself or sending it back internationally. It could mean lost money due to non-functioning parts of the weapon or even extra fees for service since you did not buy it directly from them, making it a much riskier purchase.


When it comes to accuracy, both weapons are capable of 1″ groups at 25 meters. However, when using the CZ in the folded position (which is how it’s designed to be used), its accuracy drops to 5″ groups at 50m and 10″ groups at 100m.

CZ Scorpion Accuracy

The MPX-P has a longer barrel and higher velocity than the Scorpion, so it remains accurate up to 200m, though Sig Sauer doesn’t recommend this. Whereas the CZ Scorpion remains accurate up to 50m.

Sig MPX Accuracy

Real World Application

Both weapons are a viable option for those who want a firearm customized to fit their needs. However, keep in mind that the MPX has been around for many years. It has proven itself as an accurate weapon with reliable functioning. The Scorpion Evo 3 S1 has only been around since 2008, so its reliability is yet to be determined. If you want a more proven weapon with better aftermarket support, the MPX would be ideal.

Ambidextrous Weapons

The CZ Scorpion’s safety lever is located on the underside of the trigger guard. Some shooters prefer it as it allows for one-handed manipulation while still having access to the trigger finger. The MPX, on the other hand, features a traditional safety lever that you can manipulate with your firing-side thumb without losing access to your grip or trigger finger. Both weapons are ambidextrous, but they’re different in their implementation, meaning that both are equally effective for right or left-handed shooters, which makes them suitable for those who want a gun that can be used by either hand. Neither weapon has a safety catch, and both allow for complete ambidextrous manipulation, making them suitable for left or right-handed shooters.


The trigger pull on the Scorpion is lighter than that of the MPX, which requires 6 lbs. of pressure to pull the trigger, while the Scorpion only needs 4 lbs. This feature makes it ideal for those who want a gun with a light and crisp trigger feel, but it may not suit those shooters who prefer longer or heavier pulls.

CZ Scorpion Trigger

The MPX has an adjustable trigger weight meaning you can configure it however you see fit, making it suitable for both long-range target shooting as well as close-quarters tactical work. Of course, since each weapon features different mechanisms and safety implementations, your preference for one over another will depend entirely upon whether this difference is something you appreciate or not.

Sig MPX Trigger

Other Factors

When handling each weapon, you’ll notice that they’re very similar, but there are subtle differences between them that will affect which one you choose or prefer:


– The trigger pull on the Scorpion is lighter than that of the MPX, which requires 6 lbs. of pressure to pull the trigger, while the Scorpion only needs 4 lbs.

– The safety on the Scorpion is ambidextrous, whereas, on the MPX, you need to manipulate it with your non-firing hand (it’s located forward of the fire selector lever).

– The magazine release button on the MPX is precisely where your thumb rests when you grip it and so will be easier for those who are right-handed.

– If ergonomics are essential to you, then you’ll prefer the placement of controls concerning your handgrip as well as how they feel when manipulated: since both weapons have Picatinny rails, you can mount whatever you want on either gun to suit your particular preference.

– The trigger guard of the Scorpion is broader than that of the MPX. So, it may be a better choice for those with larger hands.

– The Scorpion comes with rails, unlike the MPX, which means that you can attach many more accessories to this gun if you need to.

– Neither weapon has a safety catch, and both allow for complete ambidextrous manipulation, making them suitable for left or right-handed shooters.


CZ Scorpion – 830 feet per second/250 meters (tested by manufacturer)

Sig Sauer MPX – 100-200 yards (tested by manufacturer)

CZ Scorpion – 1150 feet per second/338 meters per second

Sig Sauer MPX – 1475 feet per second/450 meters per second

Note: Velocity depends on load/projectile weight.

Yes, both firearms models can be disassembled for inspection and maintenance if required to do so. However, note that: To get better access to some internal components, you may need special tools such as Torque Wrench (for MPX) or Right Hand Ratchet (for Scorpion).

Magazines from the company – CZ-USA (CZ Scorpion), Magpul Industries Corp., etc. Parts with the same thread pitch & thread diameter as used by CZ-Scorpion can also fit these two pistols but differ slightly in size and dimension. Note: It is much cheaper to buy spare parts for Scorpion or MPX from a manufacturer than via 3rd party sources such as Century Arms, Brownells, or Bravo Company USA.

If permitted by law, check out both pistols in person (some regions restrict online selling) and shoot them before you buy them. If it is not possible or not legal – find out as much info as possible about them from reliable sources such as forums, reviews, etc.


Both guns are fantastic, and each offers something that the other doesn’t, so there isn’t a clear winner here. The differences between these two weapons may be subtle, but they affect performance comfort to some degree. Neither gun is better than the other. It all depends on how much money you have to put into your firearm. It all comes down to which one you’re more comfortable with and whether aesthetics are essential. Both firearms have a unique appeal that is heavily dependent on ‘the eye of the beholder. Spend some time thinking about these things before investing in either gun because they both have powerful pros and cons that you should consider.


We can conclude that the CZ Scorpion is a good weapon but does not compromise as the MPX. The MPX’s main selling point is its ease of accessorization and compatibility with different attachments. However, it is costly and lacks ergonomics that would appeal to some shooters. So, I would recommend going to a gun store and holding both in your hand. You’ll soon find out which one feels best to you. I hope this article helped you make your decision about choosing between two beautiful firearms. Let us know which one you chose and why.

Author Profile

Gabriel Tackett
Double major in Engineering and Geology at the University of Minnesota. Experienced shooter & hunter for over 15 years. Certified NRA officer for over 10 years working as a writer at .

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