CZ BREN 3
- Category
- Assault Rifle
- Barrel
- 367 mm
- Weight, empty
- 3.30 kg
- Introduced
- 2024
About
What it is, and why it matters
The CZ BREN 3 is the third-generation modular assault rifle with adjustable gas port, 7075 T6 aluminum receiver, and chrome-lined barrel with 20,000-round life.
The BREN 3 builds on the BREN 2's success as a Czech military service rifle, with improved ergonomics and modularity.
Available in 7"/11"/14.5"/16.5" barrels. 5.56x45 NATO. Semi-auto civilian variants in .300 AAC.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Česká zbrojovka
- Category
- Assault Rifle
- Country
- Czechia
- Status
- In production
- Produced
- 2024
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 367 mm
- Overall length
- 920 mm
- Height
- 190 mm
- Weight, empty
- 3.30 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated short stroke piston
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Trigger pull
- 25.0 N
- Capacity
- 30
- 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
- 900 m/s
- Muzzle energy
- 1700 J
- Effective range
- 500 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.
Chrome lined barrel
Short stroke piston
Adjustable gas port
Ambidextrous controls
7075 aluminum receiver
20000 round barrel life
M lok handguard
Folding stock
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 158 5.56x45mm NATO assault rifles | 3.30 kg | 3.60 kg | Lighter than about 70% |
| Overall lengthAmong 156 5.56x45mm NATO assault rifles | 920 mm | 920 mm | Near the median |
| Barrel lengthAmong 157 5.56x45mm NATO assault rifles | 367 mm | 449 mm | Shorter than about 80% |
| Magazine capacityAmong 158 5.56x45mm NATO assault rifles | 30 | 30 | Near the median |
Answers
Questions about the CZ BREN 3
How much does the CZ BREN 3 weigh?
The CZ BREN 3 weighs 3.30 kg (7.28 lb) empty.
What caliber is the CZ BREN 3?
The CZ BREN 3 is chambered in 5.56x45mm NATO.
How many rounds does the CZ BREN 3 hold?
The CZ BREN 3 holds 30 rounds, fed from a detachable box magazine.
How long is the CZ BREN 3?
The CZ BREN 3 is 920 mm (36.2 in) long overall, with a 367 mm (14.4 in) barrel.
Who makes the CZ BREN 3?
The CZ BREN 3 is made by Česká zbrojovka (Czechia).
When was the CZ BREN 3 introduced?
The CZ BREN 3 was introduced in 2024.
How does the CZ BREN 3 operate?
The CZ BREN 3 uses a gas operated short stroke piston 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
- Czech Armed Forces
- Czechia
Provenance
Confidence in this record
80%
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-bren-3' \ --header 'X-API-Key: your_key'{ "id": "cz-bren-3", "name": "CZ BREN 3", "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": "assault-rifle", "name": "Assault Rifle", "description": "Selective-fire rifles chambered in intermediate cartridges" }, "country_of_origin": "CZ", "year_introduced": 2024, "barrel_length_mm": 367, "weight_empty_g": 3300, "action_type": "gas_operated_short_stroke_piston"}