Accuracy International AS50
- Category
- Sniper Rifle
- Barrel
- 692 mm
- Weight, empty
- 14.10 kg
- Introduced
- 2007
About
What it is, and why it matters
The Accuracy International AS50 is a semi-automatic anti-materiel rifle chambered in .50 BMG, designed specifically for special operations forces requiring rapid engagement capability against hard targets. Unlike traditional bolt-action .50 caliber rifles, the AS50's gas-operated semi-automatic action allows a trained operator to fire five aimed rounds in under 1.6 seconds, providing an unprecedented volume of heavy-caliber precision fire. The rifle can be disassembled into two main sections in less than three minutes without tools for ease of transport.
The AS50 was developed in response to a US Navy SEAL requirement for a semi-automatic .50 BMG rifle that could engage multiple targets rapidly while being lighter than the Barrett M82. Its ability to fire five rounds in under 1.6 seconds makes it one of the fastest-firing .50 caliber rifles in the world, and its tool-free disassembly into two sections was specifically designed for covert insertion operations.
The AS50 was developed specifically for the US Navy SEALs, who required a semi-automatic .50 BMG platform lighter than the Barrett M82. The gas-operated action uses a dual-piston system to manage the massive forces of the .50 BMG cartridge. The rifle features an integral thumb-operated safety and a large muzzle brake that reduces felt recoil by approximately 50 percent. The quick-disassembly feature allows the rifle to be broken down into two manageable sections for covert transport.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Accuracy International
- Category
- Sniper Rifle
- Country
- United Kingdom
- Status
- Limited production
- Produced
- 2007
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 692 mm
- Overall length
- 1369 mm
- Weight, empty
- 14.10 kg
- Weight, loaded
- 14.80 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated
- Firing mechanism
- Rotating bolt
- Trigger
- Single stage
- Capacity
- 5
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Barrel
- Steel
- Stock
- Aluminum alloy
- Finish
- Matte black
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 853 m/s
- Muzzle energy
- 18000 J
- Effective range
- 1800 m
- Maximum range
- 4000 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.
Muzzle brake
Bipod
Picatinny rail
Free floating barrel
Quick disassembly
Thumb operated safety
Rear monopod
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 31 12.7x99mm NATO sniper rifles | 14.10 kg | 12.43 kg | Heavier than about 70% |
| Overall lengthAmong 31 12.7x99mm NATO sniper rifles | 1369 mm | 1384 mm | Shorter than about 60% |
| Barrel lengthAmong 31 12.7x99mm NATO sniper rifles | 692 mm | 737 mm | Shorter than about 90% |
| Magazine capacityAmong 31 12.7x99mm NATO sniper rifles | 5 | 5 | Near the median |
Answers
Questions about the Accuracy International AS50
How much does the Accuracy International AS50 weigh?
The Accuracy International AS50 weighs 14.10 kg (31.09 lb) empty and 14.80 kg (32.63 lb) loaded.
What caliber is the Accuracy International AS50?
The Accuracy International AS50 is chambered in .50 BMG.
How many rounds does the Accuracy International AS50 hold?
The Accuracy International AS50 holds 5 rounds, fed from a detachable box magazine.
How long is the Accuracy International AS50?
The Accuracy International AS50 is 1369 mm (53.9 in) long overall, with a 692 mm (27.2 in) barrel.
Who makes the Accuracy International AS50?
The Accuracy International AS50 is made by Accuracy International (United Kingdom).
When was the Accuracy International AS50 introduced?
The Accuracy International AS50 was introduced in 2007.
How does the Accuracy International AS50 operate?
The Accuracy International AS50 uses a gas operated 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
- United States Navy SEALs
- 2007
- British Special Forces
- United Kingdom
Provenance
Confidence in this record
72%
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/accuracy-international-as50' \ --header 'X-API-Key: your_key'{ "id": "accuracy-international-as50", "name": "Accuracy International AS50", "manufacturer": { "id": "accuracy-international", "name": "Accuracy International", "countryCode": "GB", "foundedYear": 1978, "website": "https://www.accuracyinternational.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:38", "updatedAt": "2026-02-18 03:43:34", "version": "866df02489fa366bae9eb49362c9e929d73f7a1c5456d99b5727d9c049063c47" }, "category": { "id": "sniper-rifle", "name": "Sniper Rifle", "description": "Precision rifles optimized for long-range accuracy" }, "country_of_origin": "GB", "year_introduced": 2007, "barrel_length_mm": 692, "weight_empty_g": 14100, "action_type": "gas_operated"}