Steyr AUG HBAR-T
- Category
- Sniper Rifle
- Barrel
- 621 mm
- Weight, empty
- 3.90 kg
- Introduced
- 1990
About
What it is, and why it matters
The Steyr AUG HBAR-T is a designated marksman variant of the legendary Steyr AUG bullpup rifle system, featuring a heavy 24.4-inch (621mm) barrel and a STANAG-compatible optics rail replacing the AUG's iconic integrated optic housing. The 'T' designation stands for the telescope/optics rail configuration, which allows mounting of dedicated precision optics such as the Schmidt & Bender 4x25 or Kahles ZF69 6x42 telescopic sights. The heavy barrel profile provides improved accuracy and sustained fire capability compared to the standard AUG barrel, while the bullpup layout keeps the overall length to just 900mm despite the extended barrel. The short-stroke gas piston system with rotating bolt delivers clean, reliable cycling, and the progressive two-stage trigger -- a hallmark of the AUG system -- provides both semi-automatic and automatic fire modes depending on trigger pull depth.
The AUG HBAR-T was one of the first bullpup rifles adapted for the designated marksman role, proving that the compact bullpup configuration could deliver precision at extended ranges when paired with a heavy barrel and quality optics.
The HBAR-T differs from the standard AUG HBAR in its receiver configuration: while the HBAR retains the integrated 1.5x optic of the standard AUG, the HBAR-T replaces this with a flat STANAG rail for mounting dedicated precision, thermal, or electro-optical sighting systems. The 24.4-inch barrel extracts maximum velocity from 5.56mm ammunition, achieving approximately 1000 m/s with standard NATO ball. The rifle accepts standard AUG 30 or 42-round translucent polymer magazines. In Austrian service, the weapon is designated StG 77 HBAR-T. The quick-change barrel system allows the HBAR-T barrel to be swapped with standard AUG barrels in seconds without tools.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Steyr Arms
- Category
- Sniper Rifle
- Country
- Austria
- Status
- In production
- Produced
- 1990
- Variant of
- Designated marksman
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 621 mm
- Overall length
- 900 mm
- Weight, empty
- 3.90 kg
- Weight, loaded
- 4.40 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated short stroke piston
- Firing mechanism
- Rotating bolt
- Trigger
- Progressive two stage
- Capacity
- 30
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum alloy
- Barrel
- Cold hammer forged steel
- Stock
- Polymer
- Finish
- Olive drab
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 1000 m/s
- Muzzle energy
- 2000 J
- Effective range
- 600 m
- Maximum range
- 3600 m
- Rate of fire
- 680 rpm
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.
Bullpup configuration
Heavy barrel
Stanag scope mount
Cold hammer forged barrel
Folding vertical grip
Quick change barrel
Transparent magazine
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 430 sniper rifles | 3.90 kg | 5.40 kg | Lighter than about 90% |
| Overall lengthAmong 429 sniper rifles | 900 mm | 1150 mm | Shorter than about 90% |
| Barrel lengthAmong 434 sniper rifles | 621 mm | 620 mm | Near the median |
| Magazine capacityAmong 434 sniper rifles | 30 | 6 | Among the largest capacities |
Answers
Questions about the Steyr AUG HBAR-T
How much does the Steyr AUG HBAR-T weigh?
The Steyr AUG HBAR-T weighs 3.90 kg (8.60 lb) empty and 4.40 kg (9.70 lb) loaded.
What caliber is the Steyr AUG HBAR-T?
The Steyr AUG HBAR-T is chambered in 5.56x45mm NATO.
How many rounds does the Steyr AUG HBAR-T hold?
The Steyr AUG HBAR-T holds 30 rounds, fed from a detachable box magazine.
How long is the Steyr AUG HBAR-T?
The Steyr AUG HBAR-T is 900 mm (35.4 in) long overall, with a 621 mm (24.4 in) barrel.
Who makes the Steyr AUG HBAR-T?
The Steyr AUG HBAR-T is made by Steyr Arms (Austria). It was designed by Horst Wesp.
When was the Steyr AUG HBAR-T introduced?
The Steyr AUG HBAR-T was introduced in 1990.
How does the Steyr AUG HBAR-T operate?
The Steyr AUG HBAR-T uses a gas operated short stroke piston 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
- Austrian Armed Forces
- 1990
- Australian Defence Force
- Australia
- Irish Defence Forces
- Ireland
Provenance
Confidence in this record
76%
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/steyr-aug-hbar-t' \ --header 'X-API-Key: your_key'{ "id": "steyr-aug-hbar-t", "name": "Steyr AUG HBAR-T", "manufacturer": { "id": "steyr-mannlicher", "name": "Steyr Arms", "countryCode": "AT", "foundedYear": 1864, "website": "https://www.steyr-arms.com", "logoUrl": null, "description": "Austrian rifle manufacturer, founded 1864. Currently produces hunting and sporting rifles.", "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-04-05 22:24:37", "updatedAt": "2026-04-05 22:24:37", "version": "a826cd329c11aab62c76039016717ad94b5d38e37df48de00a5a6800ce0b3c60" }, "category": { "id": "sniper-rifle", "name": "Sniper Rifle", "description": "Precision rifles optimized for long-range accuracy" }, "country_of_origin": "AT", "year_introduced": 1990, "barrel_length_mm": 621, "weight_empty_g": 3900, "action_type": "gas_operated_short_stroke_piston"}