Bolumburu Regina
- Category
- Pistol
- Barrel
- 83 mm
- Weight, empty
- Not recorded
- Introduced
- 1915
About
What it is, and why it matters
The Bolumburu Regina is a Spanish blowback-operated semi-automatic pocket pistol made by Gregorio Bolumburu of Eibar in the early 20th century. It is a Ruby-type (Eibar) design derived from the Browning FN Model 1903/1906 pattern, chambered primarily in 7.65mm Browning (.32 ACP) and fed from a single-stack detachable magazine. Like other Eibar Ruby-pattern pistols it features a concealed hammer, a heel-mounted magazine release, and longitudinal grooves at the muzzle for disassembly.
To feed the French Army's WWI standing order of 10,000 Ruby-type pistols a month, Eibar makers like Bolumburu stamped their nearly identical guns with a flurry of glamorous trade names - Regina, Regent, Rex, Gloria - leaving collectors with a bewildering family of look-alike pocket pistols.
'Regina' was one of several near-identical trade names Gregorio Bolumburu applied to his Ruby-type pistols alongside Regent, Rex, Gloria, Giralda and Marina. Parts are generally not interchangeable between different Eibar makers.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Gregorio Bolumburu
- Category
- Pistol
- Country
- Spain
- Status
- Discontinued
- Produced
- 1915 to 1925
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 83 mm
- Overall length
- 150 mm
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Blowback
- Firing mechanism
- Hammer fired
- Trigger
- Single action
- Capacity
- 9
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Slide
- Steel
- Barrel
- Steel
- Finish
- Blued
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 300 m/s
- Muzzle energy
- 200 J
- Effective range
- 25 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.
No load solved for this record yetThe flight path is computed from a cartridge and a bullet. This record has no ammunition filed against its chambering, so there is nothing to solve.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Concealed hammer
Heel magazine release
Fixed sights
Longitudinal muzzle grooves
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 |
|---|---|---|---|
| Overall lengthAmong 124 .32 ACP pistols | 150 mm | 155 mm | Shorter than about 80% |
| Barrel lengthAmong 126 .32 ACP pistols | 83 mm | 87 mm | Shorter than about 60% |
| Magazine capacityAmong 127 .32 ACP pistols | 9 | 8 | Holds more rounds than about 80% |
Answers
Questions about the Bolumburu Regina
What caliber is the Bolumburu Regina?
The Bolumburu Regina is chambered in .32 ACP and .25 ACP.
How many rounds does the Bolumburu Regina hold?
The Bolumburu Regina holds 9 rounds, fed from a detachable box magazine.
How long is the Bolumburu Regina?
The Bolumburu Regina is 150 mm (5.91 in) long overall, with a 83 mm (3.27 in) barrel.
Who makes the Bolumburu Regina?
The Bolumburu Regina is made by Gregorio Bolumburu (Spain).
When was the Bolumburu Regina introduced?
The Bolumburu Regina was introduced in 1915 and discontinued in 1925.
How does the Bolumburu Regina operate?
The Bolumburu Regina 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
- French Army
- 1915
Provenance
Confidence in this record
63%
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/regina' \ --header 'X-API-Key: your_key'{ "id": "regina", "name": "Bolumburu Regina", "manufacturer": { "id": "gregorio-bolumburu", "name": "Gregorio Bolumburu", "countryCode": "ES", "foundedYear": null, "website": null, "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-07-06 11:00:16", "updatedAt": "2026-07-06 11:00:16", "version": "78b2d915663a404df251c1d16bb1a27db082063bfd2869df6bae923fd87ebca8" }, "category": { "id": "pistol", "name": "Pistol", "description": "Handguns designed to be fired with one or two hands" }, "country_of_origin": "ES", "year_introduced": 1915, "barrel_length_mm": 83, "weight_empty_g": null, "action_type": "blowback"}