Feinwerkbau 300S
- Category
- Rifle
- Barrel
- 437 mm
- Weight, empty
- 4.90 kg
- Introduced
- 1969
About
What it is, and why it matters
The Feinwerkbau 300S is a recoilless single-stroke spring-piston match air rifle chambered in .177 (4.5mm). Introduced in 1969 by the German precision manufacturer Feinwerkbau, it became the dominant 10-metre target air rifle of the 1970s and 1980s. Its defining feature is a recoilless sledge system in which the entire spring-piston barrel-and-action assembly slides on rails to absorb recoil, allowing the rifle to remain motionless during firing for exceptional accuracy. Cocked by a side lever, it is a single-shot rifle fitted with a match-adjustable two-stage trigger, micrometer aperture rear sight, and globe front sight with interchangeable inserts.
Through the 1970s the FWB 300S was the rifle to beat in Olympic 10-metre air rifle competition, its recoilless sledge action giving shooters a dead-still platform years before pneumatic match rifles took over.
The recoilless 'sledge' action and side-lever cocking made the 300S a benchmark Olympic-class target air rifle; surviving examples remain prized by vintage match shooters.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Feinwerkbau GmbH
- Category
- Rifle
- Country
- Germany
- Status
- Discontinued
- Produced
- 1969 to 1989
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 437 mm
- Overall length
- 1100 mm
- Weight, empty
- 4.90 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Single action
- Firing mechanism
- Fixed firing pin
- Trigger
- Two stage
- Trigger pull
- 1.0 N
- Capacity
- 1
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Barrel
- Steel
- Stock
- Beech
- Finish
- Blued
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 195 m/s
- Muzzle energy
- 8 J
- Effective range
- 10 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.
Recoilless sledge action
Sidelever cocking
Single stroke spring piston
Micrometer aperture rear sight
Globe front sight inserts
Match adjustable trigger
Adjustable cheekpiece
Adjustable butt plate
Anschutz accessory rail
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 52 .177 Air (4.5mm) rifles | 4.90 kg | 3.90 kg | Among the heaviest tenth |
| Overall lengthAmong 52 .177 Air (4.5mm) rifles | 1100 mm | 1085 mm | Longer than about 60% |
| Barrel lengthAmong 52 .177 Air (4.5mm) rifles | 437 mm | 428 mm | Longer than about 60% |
| Magazine capacityAmong 52 .177 Air (4.5mm) rifles | 1 | 1 | Near the median |
Answers
Questions about the Feinwerkbau 300S
How much does the Feinwerkbau 300S weigh?
The Feinwerkbau 300S weighs 4.90 kg (10.80 lb) empty.
What caliber is the Feinwerkbau 300S?
The Feinwerkbau 300S is chambered in .177 Air (4.5mm).
How many rounds does the Feinwerkbau 300S hold?
The Feinwerkbau 300S holds 1 rounds.
How long is the Feinwerkbau 300S?
The Feinwerkbau 300S is 1100 mm (43.3 in) long overall, with a 437 mm (17.2 in) barrel.
Who makes the Feinwerkbau 300S?
The Feinwerkbau 300S is made by Feinwerkbau GmbH (Germany). It was designed by Feinwerkbau.
When was the Feinwerkbau 300S introduced?
The Feinwerkbau 300S was introduced in 1969 and discontinued in 1989.
How does the Feinwerkbau 300S operate?
The Feinwerkbau 300S uses a single action, and its firing mechanism is fixed firing pin.
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
80%
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/feinwerkbau-300s' \ --header 'X-API-Key: your_key'{ "id": "feinwerkbau-300s", "name": "Feinwerkbau 300S", "manufacturer": { "id": "feinwerkbau", "name": "Feinwerkbau GmbH", "countryCode": "DE", "foundedYear": 1949, "website": "https://www.feinwerkbau.de", "logoUrl": null, "description": "German manufacturer of high-precision sporting firearms including air rifles, small bore rifles, air pistols, and sporting pistols.", "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-06-21 23:00:46", "updatedAt": "2026-06-21 23:00:46", "version": "5ce03658393b18ad343848841a1e542ed41506737550fac7e86e352aea58a154" }, "category": { "id": "rifle", "name": "Rifle", "description": "Long-barreled firearms designed for accurate shooting" }, "country_of_origin": "DE", "year_introduced": 1969, "barrel_length_mm": 437, "weight_empty_g": 4900, "action_type": "single_action"}