WBP Jack
- Category
- Assault Rifle
- Barrel
- 415 mm
- Weight, empty
- 3.00 kg
- Introduced
- 2016
About
What it is, and why it matters
The WBP Jack is a semi-automatic, AKM-pattern rifle chambered in 7.62x39mm, built by the Polish manufacturer WBP Rogów (Wytwórnia Broni Jacek Popiński) in Rogów, Poland. It pairs a stamped AKM receiver with an FB Radom hammer-forged, chrome-lined barrel and Polish laminated furniture, and is exported widely to the civilian sporting market - most notably the United States and Canada. The Jack accepts standard AK-pattern magazines and drums, carries a 16.3-inch (415 mm) barrel threaded to the AK-standard 14x1mm left-hand pitch, and includes a side optic rail and bayonet lug. It is regarded as one of the better-built modern commercial AKM clones, combining authentic Warsaw Pact pattern construction with consistent Polish manufacturing quality.
WBP Rogów grew out of a small workshop that refurbished Cold War-surplus Kalashnikovs, making parts as needed until it could build nearly whole rifles - and the Jack, named for company founder Jacek Popiński, became one of the most respected modern commercial AKMs to come out of Poland.
WBP began as a refurbisher of military-surplus AK rifles for the Polish commercial market before scaling up to manufacture nearly complete rifles. The Jack is offered in several configurations and calibers (7.62x39mm, 5.56x45mm NATO as the 556SR, and 5.45x39mm), and the short-barreled Mini Jack debuted at MSPO 2017. Despite the .308-pattern AK rifles offered by other makers (e.g. the Russian AK-308), WBP's Jack line is built on the standard intermediate-caliber AKM platform, not a 7.62x51mm full-power action.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Wytwórnia Broni Jacek Popiński (WBP Rogów)
- Category
- Assault Rifle
- Country
- Poland
- Status
- In production
- Produced
- 2016
- Variant of
- Foreign production
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 415 mm
- Overall length
- 880 mm
- Weight, empty
- 3.00 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated long stroke
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 30
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Barrel
- Steel
- Stock
- Wood
- Finish
- Black nitride
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 715 m/s
- Muzzle energy
- 2037 J
- Effective range
- 400 m
- Maximum range
- 800 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
Hammer forged barrel
Rotating bolt
Stamped receiver
Bayonet lug
Side optic rail
Threaded barrel
Laminated 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 59 7.62x39mm assault rifles | 3.00 kg | 3.60 kg | Lighter than about 90% |
| Overall lengthAmong 58 7.62x39mm assault rifles | 880 mm | 880 mm | Near the median |
| Barrel lengthAmong 57 7.62x39mm assault rifles | 415 mm | 415 mm | Near the median |
| Magazine capacityAmong 59 7.62x39mm assault rifles | 30 | 30 | Near the median |
Its place in the rankings
Answers
Questions about the WBP Jack
How much does the WBP Jack weigh?
The WBP Jack weighs 3.00 kg (6.61 lb) empty. It is the 4th lightest of 59 7.62x39mm assault rifles in the catalogue.
What caliber is the WBP Jack?
The WBP Jack is chambered in 7.62x39mm.
How many rounds does the WBP Jack hold?
The WBP Jack holds 30 rounds, fed from a detachable box magazine.
How long is the WBP Jack?
The WBP Jack is 880 mm (34.6 in) long overall, with a 415 mm (16.3 in) barrel.
Who makes the WBP Jack?
The WBP Jack is made by Wytwórnia Broni Jacek Popiński (WBP Rogów) (Poland).
When was the WBP Jack introduced?
The WBP Jack was introduced in 2016.
How does the WBP Jack operate?
The WBP Jack uses a gas operated long stroke 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
Provenance
Confidence in this record
74%
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/wbp-jack' \ --header 'X-API-Key: your_key'{ "id": "wbp-jack", "name": "WBP Jack", "manufacturer": { "id": "wbp", "name": "Wytwórnia Broni Jacek Popiński (WBP Rogów)", "countryCode": "PL", "foundedYear": null, "website": "https://www.wbprogow.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-06-21 23:00:46", "updatedAt": "2026-06-21 23:00:46", "version": "520e1dd093e981af30237990b75bf9e627ff368c0dac7517a19603f7ff876ee1" }, "category": { "id": "assault-rifle", "name": "Assault Rifle", "description": "Selective-fire rifles chambered in intermediate cartridges" }, "country_of_origin": "PL", "year_introduced": 2016, "barrel_length_mm": 415, "weight_empty_g": 3000, "action_type": "gas_operated_long_stroke"}