Siamese Mauser Type 47/66 Carbine
- Category
- Carbine
- Barrel
- Not recorded
- Weight, empty
- Not recorded
- Introduced
- 1904
About
What it is, and why it matters
The Siamese Mauser Type 47/66 is a bolt-action carbine adopted by the Kingdom of Siam (Thailand). Built on a Mauser-pattern bolt action and manufactured by Japan's Koishikawa Arsenal with final assembly in Bangkok, the original Type 47 carbine (adopted 1904, BE 2447) was chambered for the 8x50mmR Siamese round-nose cartridge. In 1923 (BE 2466) surviving arms were rechambered and rebarreled for the more powerful spitzer 8x52mmR Siamese 'Type 66' cartridge, producing the Type 47/66 designation. The carbine feeds from a five-round internal box magazine loaded via stripper clips.
The Siamese Mauser was built in Japan rather than Germany: Koishikawa Arsenal in Tokyo forged and machined the parts for shipment to Bangkok, and the guns are stamped with a Thai Chakra emblem instead of a Mauser banner. When Siam upgraded to the spitzer 8x52mmR 'Type 66' cartridge in 1923, armorers simply ground down the old rear-sight ramps to re-regulate the sights for the flatter-shooting load.
The 'Type' numbers are Buddhist Era (BE) regnal-calendar years: Type 45 = the 1902 cartridge, Type 46 = the 1903 rifle, Type 47 = the 1904 carbine, and Type 66 = the 1923 cartridge/conversion. Exact carbine weight and barrel/overall length are not consistently published; those fields are left null.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Koishikawa Arsenal
- Category
- Carbine
- Country
- Thailand
- Status
- Discontinued
- Produced
- 1904
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Bolt action
- Firing mechanism
- Striker fired
- Trigger
- Single stage
- Capacity
- 5
- Magazine
- Internal
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Barrel
- Steel
- Stock
- Wood
- Finish
- Blued
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 680 m/s
- Muzzle energy
- 2704 J
- Effective range
- 400 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.
Stripper clip loading
Mauser pattern bolt action
Tangent leaf rear sight
Full length wood 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 |
|---|---|---|---|
| Magazine capacityAmong 423 carbines | 5 | 21 | Holds fewer rounds than about 80% |
Answers
Questions about the Siamese Mauser Type 47/66 Carbine
What caliber is the Siamese Mauser Type 47/66 Carbine?
The Siamese Mauser Type 47/66 Carbine is chambered in 8x52mmR Siamese.
How many rounds does the Siamese Mauser Type 47/66 Carbine hold?
The Siamese Mauser Type 47/66 Carbine holds 5 rounds, fed from an internal magazine.
Who makes the Siamese Mauser Type 47/66 Carbine?
The Siamese Mauser Type 47/66 Carbine is made by Koishikawa Arsenal (Japan).
When was the Siamese Mauser Type 47/66 Carbine introduced?
The Siamese Mauser Type 47/66 Carbine was introduced in 1904.
How does the Siamese Mauser Type 47/66 Carbine operate?
The Siamese Mauser Type 47/66 Carbine uses a bolt action, and its firing mechanism is striker 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
- Royal Siamese Army
- 1904
- Royal Thai Armed Forces
- 1923
Provenance
Confidence in this record
60%
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/siamese-mauser-type-47-66-carbine' \ --header 'X-API-Key: your_key'{ "id": "siamese-mauser-type-47-66-carbine", "name": "Siamese Mauser Type 47/66 Carbine", "manufacturer": { "id": "koishikawa-arsenal", "name": "Koishikawa Arsenal", "countryCode": "JP", "foundedYear": 1871, "website": null, "logoUrl": null, "description": "Imperial Japanese Army arsenal in Tokyo that produced rifles including the Murata and Arisaka, operating from 1871 until relocated to Kokura in 1935.", "status": "defunct", "defunctYear": 1935, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-05-04 12:38:54", "updatedAt": "2026-05-04 12:38:54", "version": "9b554d58122b1e2995682948aeb9daf2784434a1d09071724b74d94445e76bb6" }, "category": { "id": "carbine", "name": "Carbine", "description": "Shortened rifles for close-quarters use" }, "country_of_origin": "TH", "year_introduced": 1904, "barrel_length_mm": null, "weight_empty_g": null, "action_type": "bolt_action"}