CZ Scorpion EVO 3 S1
- Category
- Submachine Gun
- Barrel
- 196 mm
- Weight, empty
- 2.27 kg
- Introduced
- 2015
About
What it is, and why it matters
The CZ Scorpion EVO 3 S1 is the semi-automatic civilian variant of the CZ Scorpion EVO 3 A1 select-fire submachine gun, developed by Ceska zbrojovka (CZUB) in the Czech Republic. Introduced to the civilian market in 2015, the S1 retains the A1's blowback operating system, polymer lower receiver, cold hammer-forged 196mm barrel, and fully ambidextrous controls, but is limited to semi-automatic fire only with a two-position safety selector (safe and fire). Available as both a pistol configuration (without stock, 406mm overall length) and a carbine configuration (with 412mm barrel and fixed stock, 630mm overall length), the S1 has become one of the most popular pistol-caliber firearms in the United States. The weapon ships with 20-round translucent polymer magazines but is compatible with all CZ Scorpion EVO 3 magazines including 30-round standard and aftermarket extended options. The S1 features a full-length Picatinny rail on top for optics, M-LOK attachment points on the handguard, and a 1/2x28 threaded muzzle for suppressor or muzzle device attachment.
The S1 became one of the most popular pistol-caliber platforms in the U.S. civilian market, spawning a robust aftermarket ecosystem. The addition of SB Tactical braces became the single most popular modification, and the platform's affordability made it the go-to recommendation for first-time PCC buyers.
The S1 designation indicates 'Semi-automatic, Model 1' in CZ's nomenclature, distinguishing it from the A1 (Automatic, Model 1) military variant. The semi-auto-only trigger group uses a different disconnector that prevents automatic fire, and the fire selector has only two positions rather than four. The pistol version was initially sold in the US without any brace or stock; the addition of an SB Tactical brace became one of the most popular aftermarket modifications. The S1 Carbine variant adds a longer 412mm (16.2-inch) barrel to comply with US rifle length requirements and includes a factory-installed fixed stock. The S2 Micro features an ultra-short 104mm barrel for maximum compactness. All S1 variants accept the same magazines and share the same lower receiver. The weapon has developed a robust aftermarket ecosystem including HB Industries triggers, Magpul magazines, and numerous handguard and brace options.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Česká zbrojovka
- Category
- Submachine Gun
- Country
- Czechia
- Status
- In production
- Produced
- 2015
- Variant of
- Semi auto civilian
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 196 mm
- Overall length
- 406 mm
- Height
- 210 mm
- Width
- 60 mm
- Weight, empty
- 2.27 kg
- Weight, loaded
- 2.54 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Blowback
- Firing mechanism
- Hammer fired
- Trigger
- Semi auto
- Capacity
- 20
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Polymer
- Barrel
- Steel
- Finish
- Matte black
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 366 m/s
- Muzzle energy
- 499 J
- Effective range
- 200 m
Trajectory
What the round does downrange
Solved from the muzzle figures and the bullet. The dashed rule is the effective range on the record, and the crosses are the steps the solver returned.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Closed bolt firing
Cold hammer forged barrel- Semi auto only
Ambidextrous controls
Picatinny rail
Iron sights
Threaded barrel
Modular design
Polymer lower receiver
M lok handguard
Standing
How it compares
Each figure against the firearms of the same type and cartridge that record it, or of the same type where that cartridge has too few. Positions are read to the nearest tenth.
| Measurement | This firearm | Median | Position |
|---|---|---|---|
| Empty weightAmong 201 9x19mm Parabellum submachine guns | 2.27 kg | 3.18 kg | Lighter than about 90% |
| Overall lengthAmong 200 9x19mm Parabellum submachine guns | 406 mm | 723 mm | Among the shortest tenth |
| Barrel lengthAmong 202 9x19mm Parabellum submachine guns | 196 mm | 213 mm | Shorter than about 80% |
| Magazine capacityAmong 204 9x19mm Parabellum submachine guns | 20 | 32 | Among the smallest capacities |
Answers
Questions about the CZ Scorpion EVO 3 S1
How much does the CZ Scorpion EVO 3 S1 weigh?
The CZ Scorpion EVO 3 S1 weighs 2.27 kg (5.00 lb) empty and 2.54 kg (5.60 lb) loaded.
What caliber is the CZ Scorpion EVO 3 S1?
The CZ Scorpion EVO 3 S1 is chambered in 9x19mm Parabellum.
How many rounds does the CZ Scorpion EVO 3 S1 hold?
The CZ Scorpion EVO 3 S1 holds 20 rounds, fed from a detachable box magazine.
How long is the CZ Scorpion EVO 3 S1?
The CZ Scorpion EVO 3 S1 is 406 mm (16.0 in) long overall, with a 196 mm (7.72 in) barrel.
Who makes the CZ Scorpion EVO 3 S1?
The CZ Scorpion EVO 3 S1 is made by Česká zbrojovka (Czechia).
When was the CZ Scorpion EVO 3 S1 introduced?
The CZ Scorpion EVO 3 S1 was introduced in 2015.
How does the CZ Scorpion EVO 3 S1 operate?
The CZ Scorpion EVO 3 S1 uses a blowback action, and its firing mechanism is hammer fired.
Compatibility
Which parts fit this firearm
Studio
Every part that mounts on this, resolved
Not a list the maker typed out: the answer comes from the mounts this firearm exposes and the interface each part needs, so it stays right when either one changes.
- Every part that mounts on any firearm in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per part, so it is not part of the public record.
Provenance
What the record holds
Every figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
In service
- United States Civilian Market
- 2015
- European Civilian Sporting Market
- 2015
Provenance
Confidence in this record
84%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this firearm yet
Stock and prices come from the shops themselves. If you sell this firearm, you can list it and it appears here.
List a firearmMCP
Ask an assistant about it
The same record, reached the way a person asks for it rather than the way a program does.
Ask GunSpec
Works with
Point an MCP client at GunSpec and it answers from the catalogue rather than from memory. A free key covers the read tools.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/firearms/cz-scorpion-evo-3-s1' \ --header 'X-API-Key: your_key'{ "id": "cz-scorpion-evo-3-s1", "name": "CZ Scorpion EVO 3 S1", "manufacturer": { "id": "cz", "name": "Česká zbrojovka", "countryCode": "CZ", "foundedYear": 1936, "website": "https://www.czfirearms.com", "logoUrl": null, "description": "Czech firearms manufacturer based in Uherský Brod, established in 1936 as a strategic armaments facility and became the main Czechoslovak producer of small firearms after World War II.", "status": "active", "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:38", "updatedAt": "2026-02-18 03:43:46", "version": "3d31eca95fe86453b3e4ce39da89e68e7772f8583a0d304f8ec5873a2440ab13" }, "category": { "id": "submachine-gun", "name": "Submachine Gun", "description": "Automatic firearms chambered in pistol calibers" }, "country_of_origin": "CZ", "year_introduced": 2015, "barrel_length_mm": 196, "weight_empty_g": 2270, "action_type": "blowback"}