Sauer S404 Synchro XTC
- Category
- Sniper Rifle
- Barrel
- 560 mm
- Weight, empty
- 2.70 kg
- Introduced
- 2018
About
What it is, and why it matters
The Sauer S404 Synchro XTC is an ultra-lightweight German precision rifle featuring a carbon fiber-reinforced polymer stock and the renowned Sauer Quattro adjustable trigger. Weighing just 2.7 kg empty, it is one of the lightest modular bolt-action precision platforms available, making it exceptionally well-suited for mountain hunting and mobile tactical applications. The S404 platform features the SUS (Sauer Universal Key) system for rapid barrel and stock changes, allowing caliber conversion in minutes. Cold hammer forged barrels are guaranteed to deliver sub-MOA accuracy, and the adjustable comb provides a consistent cheek weld for precision optics use.
J.P. Sauer & Sohn is one of the oldest firearms manufacturers in the world, founded in 1751 in Suhl, Germany. The S404 Synchro XTC represents the pinnacle of their engineering philosophy -- achieving maximum precision with minimum weight. The carbon fiber stock technology borrowed from the aerospace industry helps achieve a rifle weight that seems almost impossibly light for its capability.
The S404 Synchro XTC was introduced as a high-end tactical/sporting variant of the S404 platform, emphasizing extreme weight reduction through carbon fiber construction. The Quattro trigger system allows adjustment of trigger pull weight, take-up, and let-off characteristics. Standard caliber barrels are 22 inches (560mm), while magnum caliber barrels extend to 24 inches (610mm). The SUS universal key allows barrel and stock changes with a single tool. Despite its hunting rifle origins, the S404 XTC's combination of extreme lightness, modular design, and guaranteed accuracy has attracted interest from tactical shooters who value mobility.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- J.P. Sauer & Sohn
- Category
- Sniper Rifle
- Country
- Germany
- Status
- In production
- Produced
- 2018
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 560 mm
- Overall length
- 1080 mm
- Weight, empty
- 2.70 kg
- Weight, loaded
- 3.10 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Bolt action
- Firing mechanism
- Striker fired
- Trigger
- Single stage
- Trigger pull
- 7.5 N
- Capacity
- 3
- 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
- Carbon fiber polymer
- Finish
- Cerakote matte
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 860 m/s
- Muzzle energy
- 3592 J
- Effective range
- 800 m
- Maximum range
- 3700 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.
Free floating barrel
Cold hammer forged barrel
Quick change barrel
Multi caliber conversion
Adjustable comb
Quattro trigger
Carbon fiber stock- Sus universal key system
- Sub moa guarantee
Suppressor ready
Modular stock system
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 95 .308 Winchester sniper rifles | 2.70 kg | 5.20 kg | Among the lightest tenth |
| Overall lengthAmong 95 .308 Winchester sniper rifles | 1080 mm | 1130 mm | Shorter than about 70% |
| Barrel lengthAmong 95 .308 Winchester sniper rifles | 560 mm | 610 mm | Shorter than about 70% |
| Magazine capacityAmong 95 .308 Winchester sniper rifles | 3 | 7 | Holds fewer rounds than about 90% |
Its place in the rankings
Answers
Questions about the Sauer S404 Synchro XTC
How much does the Sauer S404 Synchro XTC weigh?
The Sauer S404 Synchro XTC weighs 2.70 kg (5.95 lb) empty and 3.10 kg (6.83 lb) loaded. It is the 1st lightest of 95 .308 Winchester sniper rifles in the catalogue.
What caliber is the Sauer S404 Synchro XTC?
The Sauer S404 Synchro XTC is chambered in .308 Winchester, .300 Winchester Magnum, and .338 Lapua Magnum.
How many rounds does the Sauer S404 Synchro XTC hold?
The Sauer S404 Synchro XTC holds 3 rounds, fed from a detachable box magazine.
How long is the Sauer S404 Synchro XTC?
The Sauer S404 Synchro XTC is 1080 mm (42.5 in) long overall, with a 560 mm (22.0 in) barrel.
Who makes the Sauer S404 Synchro XTC?
The Sauer S404 Synchro XTC is made by J.P. Sauer & Sohn (Germany).
When was the Sauer S404 Synchro XTC introduced?
The Sauer S404 Synchro XTC was introduced in 2018.
How does the Sauer S404 Synchro XTC operate?
The Sauer S404 Synchro XTC 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.
Provenance
Confidence in this record
75%
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/sauer-s404-synchro-xtc' \ --header 'X-API-Key: your_key'{ "id": "sauer-s404-synchro-xtc", "name": "Sauer S404 Synchro XTC", "manufacturer": { "id": "sauer", "name": "J.P. Sauer & Sohn", "countryCode": "DE", "foundedYear": 1751, "website": "https://www.sauer.de", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-03-21 00:31:46", "updatedAt": "2026-03-21 00:31:46", "version": "63e574e61eaf798f61dc5058c4ed920d6a6c0635e4138ef21a14d10a1d82b068" }, "category": { "id": "sniper-rifle", "name": "Sniper Rifle", "description": "Precision rifles optimized for long-range accuracy" }, "country_of_origin": "DE", "year_introduced": 2018, "barrel_length_mm": 560, "weight_empty_g": 2700, "action_type": "bolt_action"}