XT100
- Category
- Assault Rifle
- Barrel
- 406 mm
- Weight, empty
- Not recorded
- Introduced
- 2011
About
What it is, and why it matters
The XT100 is a Taiwanese experimental gas-operated, select-fire assault rifle developed by the 205th Armory of the Combined Logistics Command. Built on an AR-15-style layout, it uses a short-stroke gas piston operating system and a forward quad rail, and is chambered in the 6.8mm Remington SPC cartridge. The 'XT' designation stands for 'Experimental Type', reflecting its role as a technology demonstrator unveiled around 2011 at the Taipei Aerospace & Defense Technology Exhibition. The 6.8 SPC chambering aimed to deliver greater terminal energy than the 5.56x45mm NATO round used by Taiwan's existing T91 service rifle.
Taiwan's indigenous small-arms development is centered on the 205th Armory, which has long produced the island's service rifles. The XT100 explored adopting the American 6.8mm SPC cartridge (a 5.56mm case necked up to 6.8mm) to bridge the power gap between intermediate and full-power rounds, an experimental path that the Taiwanese military ultimately did not pursue for its frontline rifle.
The XT100 remained an experimental/demonstrator program and was not adopted for general service; Taiwan later pursued the 5.56x45mm NATO T112 rifle as its next-generation service weapon. Barrel length is reported as 16 inches (~406 mm).
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- 205th Arsenal, Combined Service Forces
- Category
- Assault Rifle
- Country
- Taiwan
- Status
- Prototype
- Produced
- 2011
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 406 mm
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated
- Firing mechanism
- Hammer fired
- Capacity
- 25
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum alloy
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Black
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 808 m/s
- Muzzle energy
- 2450 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.
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.
Short stroke gas piston
Forward quad rail- Ar 15 style layout
Select fire
Adjustable 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 |
|---|---|---|---|
| Barrel lengthAmong 271 assault rifles | 406 mm | 415 mm | Shorter than about 70% |
| Magazine capacityAmong 276 assault rifles | 25 | 30 | Holds fewer rounds than about 90% |
Answers
Questions about the XT100
What caliber is the XT100?
The XT100 is chambered in 6.8mm Remington SPC.
How many rounds does the XT100 hold?
The XT100 holds 25 rounds, fed from a detachable box magazine.
How long is the XT100?
The XT100 has a 406 mm (16.0 in) barrel.
Who makes the XT100?
The XT100 is made by 205th Arsenal, Combined Service Forces (Taiwan). It was designed by 205th Armory, Combined Logistics Command.
When was the XT100 introduced?
The XT100 was introduced in 2011.
How does the XT100 operate?
The XT100 uses a gas operated 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
- Republic of China Army (evaluation)
- 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/xt100' \ --header 'X-API-Key: your_key'{ "id": "xt100", "name": "XT100", "manufacturer": { "id": "205th-arsenal", "name": "205th Arsenal, Combined Service Forces", "countryCode": "TW", "foundedYear": null, "website": null, "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:40", "updatedAt": "2026-02-18 03:40:48", "version": "95cb447790e11c9ceb2bdb7d77ed215db5cb6e904c509efa3e073a91355d0158" }, "category": { "id": "assault-rifle", "name": "Assault Rifle", "description": "Selective-fire rifles chambered in intermediate cartridges" }, "country_of_origin": "TW", "year_introduced": 2011, "barrel_length_mm": 406, "weight_empty_g": null, "action_type": "gas_operated"}