XT105
- Category
- Carbine
- Barrel
- 360 mm
- Weight, empty
- Not recorded
- Introduced
- 2015
About
What it is, and why it matters
The XT105 is a Taiwanese modular 5.56x45mm NATO gas-operated carbine developed by the 205th Armory of the Ministry of National Defense's Armament Bureau, publicly unveiled in 2015. A refinement of the earlier XT97 prototype, it uses an extruded single-piece aluminum upper receiver and a polymer lower, and accepts interchangeable 300mm, 360mm and 450mm barrels for field-swappable configuration. It drops the three-round burst of the T91 in favor of a lower-rate full-automatic mode for better control, and adds an ambidextrous layout, a collapsible stock, full-length Picatinny rail with M-Lok/KeyMod mounting, and forward shell ejection to protect the operator. It was intended as a successor to the T91 but remained a demonstrator and was not adopted for general service.
Unveiled in 2015 with a gold-plated demonstrator, the XT105 was the 205th Armory's bid to replace the T91 with a modular, quick-barrel-change rifle - a follow-on to the XT97 that combined Kalashnikov-derived internals with a new gas system, but it never advanced past the prototype stage.
The first XT105 off the production line was gold-plated for the 2015 press unveiling. Inherits Kalashnikov-derived mechanical DNA from the XT97 lineage mated to a revised gas system. Public specifications for weight, overall length and rate of fire have not been released.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- 205th Armory
- Category
- Carbine
- Country
- Taiwan
- Status
- Prototype
- Produced
- 2015
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 360 mm
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated rotating bolt
- Firing mechanism
- Rotating bolt
- Trigger
- Single stage
- Capacity
- 30
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Phosphate
BallisticsFrom the service cartridge, not a handload.
- 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.
Quick change barrel
Ambidextrous controls
Telescoping stock
Picatinny rail
M lok handguard
Forward ejection
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 |
|---|---|---|---|
| Barrel lengthAmong 150 5.56x45mm NATO carbines | 360 mm | 406 mm | Shorter than about 70% |
| Magazine capacityAmong 150 5.56x45mm NATO carbines | 30 | 30 | Near the median |
Answers
Questions about the XT105
What caliber is the XT105?
The XT105 is chambered in 5.56x45mm NATO.
How many rounds does the XT105 hold?
The XT105 holds 30 rounds, fed from a detachable box magazine.
How long is the XT105?
The XT105 has a 360 mm (14.2 in) barrel.
Who makes the XT105?
The XT105 is made by 205th Armory (Taiwan).
When was the XT105 introduced?
The XT105 was introduced in 2015.
How does the XT105 operate?
The XT105 uses a gas operated rotating bolt action, and its firing mechanism is rotating bolt.
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
- Republic of China Armed Forces
- Taiwan
Provenance
Confidence in this record
55%
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/xt105' \ --header 'X-API-Key: your_key'{ "id": "xt105", "name": "XT105", "manufacturer": { "id": "205th-armory", "name": "205th Armory", "countryCode": "TW", "foundedYear": 1945, "website": null, "logoUrl": null, "description": null, "status": "active", "defunctYear": null, "stateOwned": true, "makesFirearms": true, "parentId": null, "predecessorId": null, "createdAt": "2026-04-05 22:24:37", "updatedAt": "2026-04-05 22:24:37", "version": "1256c35bd373f609ccaeff7942f3b8df63e8b0097f5c468fbba95344db513e5c" }, "category": { "id": "carbine", "name": "Carbine", "description": "Shortened rifles for close-quarters use" }, "country_of_origin": "TW", "year_introduced": 2015, "barrel_length_mm": 360, "weight_empty_g": null, "action_type": "gas_operated_rotating_bolt"}