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Browning Auto-5

Browning Auto-5
Category
Shotgun
Barrel
711 mm
Weight, empty
3.86 kg
Introduced
1902

About

What it is, and why it matters

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The Browning Auto-5 is the first successful semi-automatic shotgun ever produced, designed by John Moses Browning and patented in 1898, with full-scale production commencing in 1902 at Fabrique Nationale d'Herstal (FN) in Belgium. Browning himself considered it his finest achievement, and it introduced the long-recoil operating system that still bears his name as the archetypal implementation of the technique. The action cycles when both the barrel and bolt travel rearward together for the full length of the shell, approximately 70 millimeters, before the bolt is held back, the barrel returns forward ejecting the spent hull, and the bolt then slams forward chambering a fresh round from the four-round under-barrel tubular magazine. The Auto-5 is instantly recognizable by its distinctive 'humpback' receiver profile -- a straight, flat-topped receiver that made sighting along the barrel exceptionally natural and which became the defining visual signature of the design. Chambered primarily in 12 gauge but also produced in 16 gauge (the beloved Sweet Sixteen) and 20 gauge (the Light Twenty), the Auto-5 employed adjustable friction rings surrounding the recoil spring that allowed the shooter to tune the action for light field loads or heavy magnum loads. In an era dominated by pump-action and break-action shotguns, the Auto-5's ability to fire five shells as fast as the trigger could be pulled gave it an overwhelming advantage in the field, the trap range, and eventually on the battlefield. Licensed production in the United States by Remington Arms as the Model 11 (1905-1947) produced approximately 850,000 units and was widely issued as a combat shotgun in both World Wars, while Savage Arms produced the Model 720 under license from 1930 to 1949. The Auto-5 remained in continuous production at FN and later at Miroku in Japan from 1975 onward, until the final 'Final Tribute' commemorative models rolled off the line in 1998 -- a 97-year production run, the longest of any sporting firearm design in history. Over 2.75 million Belgian-built Auto-5s were produced, with millions more licensed copies from Remington, Savage, Breda, and others.

In January 1902, John Moses Browning walked into Winchester's offices in New Haven after a 19-year partnership to offer them his revolutionary self-loading shotgun -- and walked out forever when they refused to pay per-unit royalties. He went to Remington next; while waiting in the outer office, Remington's president collapsed and died of a heart attack. Within weeks Browning was aboard a steamship to Belgium, where FN Herstal accepted his terms and launched the design that defined the semi-automatic shotgun for the next 97 years -- the longest continuous production run of any sporting firearm in history and the origin of Browning's century-long partnership with FN.

The Auto-5 was originally offered to Winchester in 1902, but when Winchester refused to pay royalties on each unit sold (demanding a flat buyout instead), John Browning walked out of their Connecticut offices -- ending a 19-year business relationship -- and took the design to Remington in New York. Browning was waiting in the Remington president's outer office when the president died of a heart attack, so he boarded a steamship to Belgium and struck a deal with FN Herstal, establishing the partnership that would define Browning's brand for the next century. The long-recoil action requires tuning via the friction ring stack around the magazine tube: rings arranged one way for light loads, inverted for heavy magnum loads -- failing to adjust correctly could damage the stock or cause failures to cycle. The 'humpback' receiver profile is so iconic that the 2012 modern A5 retains the silhouette despite using an entirely different short-recoil Kinematic Drive action. Military trench shotgun variants featured shorter 20-inch barrels, bayonet lugs, heat shields over the barrel, and military sling swivels. The Remington Model 11 was the first autoloading shotgun manufactured in the United States and was the standard U.S. military combat and training shotgun through WWII. Clark Gable, Ernest Hemingway, and John Wayne were all prominent Auto-5 owners. FN produced the Auto-5 from 1902 to 1975 in Belgium (interrupted only by WWII German occupation), after which production moved to Miroku in Japan from 1976 until the 1998 Final Tribute run. The Auto-5 was briefly revived for commemorative production but the line remained closed after 1999.

Specification

Everything measured

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IdentityWhat it is, who built it and when.

Manufacturer
Browning Arms Company
Category
Shotgun
Country
Belgium
Status
Discontinued
Produced
1902 to 1998

DimensionsAs issued, without a magazine or an optic.

Barrel
711 mm
Overall length
1270 mm
Weight, empty
3.86 kg

ActionHow it cycles, what trips it, and what feeds it.

Action
Long recoil
Firing mechanism
Hammer fired
Trigger
Single stage
Capacity
4
Magazine
Tube

MaterialsEach swatch is the material itself, not a colour chosen to stand for it.

Frame
Steel
Barrel
Steel
Stock
Wood
Finish
Blued

BallisticsFrom the service cartridge, not a handload.

Muzzle velocity
396 m/s
Muzzle energy
2500 J
Effective range
40 m
Maximum range
100 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.

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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.

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  • Humpback receiver
  • Long recoil action
  • Friction ring recoil brake
  • Under barrel tube magazine
  • Magazine cutoff lever
  • Bottom ejection port side
  • Bottom loading
  • Adjustable friction rings
  • Bead front sight
  • Checkered walnut stock
  • Engraved receiver
  • Takedown design
  • Interchangeable barrels

Standing

How it compares

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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.

MeasurementThis firearmMedianPosition
Empty weightAmong 622 12 Gauge shotguns3.86 kg3.29 kgHeavier than about 90%
Overall lengthAmong 570 12 Gauge shotguns1270 mm1150 mmLonger than about 90%
Barrel lengthAmong 650 12 Gauge shotguns711 mm711 mmLonger than about 60%
Magazine capacityAmong 647 12 Gauge shotguns43Holds more rounds than about 60%

Answers

Questions about the Browning Auto-5

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How much does the Browning Auto-5 weigh?

The Browning Auto-5 weighs 3.86 kg (8.50 lb) empty.

What caliber is the Browning Auto-5?

The Browning Auto-5 is chambered in 12 Gauge, 16 Gauge, and 20 Gauge.

How many rounds does the Browning Auto-5 hold?

The Browning Auto-5 holds 4 rounds, fed from a tube magazine.

How long is the Browning Auto-5?

The Browning Auto-5 is 1270 mm (50.0 in) long overall, with a 711 mm (28.0 in) barrel.

Who makes the Browning Auto-5?

The Browning Auto-5 is made by Browning Arms Company (United States). It was designed by John Moses Browning.

When was the Browning Auto-5 introduced?

The Browning Auto-5 was introduced in 1902 and discontinued in 1998.

How does the Browning Auto-5 operate?

The Browning Auto-5 uses a long recoil action, and its firing mechanism is hammer fired.

Compatibility

Which parts fit this firearm

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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.

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In service

United States Army
1917
United States Army (WWII)
1941
United States Marine Corps
1941
United States Army Air Forces
1941
Belgian Army
1902
British Home Guard
1940
French Armed Forces
France
Imperial Japanese Army
Japan
Civilian Hunters and Sport Shooters
1902

Provenance

Stockists

Where to buy

Offers link straight to the shop. GunSpec never takes the order.

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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 firearm

MCP

Ask an assistant about it

The same record, reached the way a person asks for it rather than the way a program does.

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Ask GunSpec

Works with

Claude CodeClaude DesktopCursorVS CodeGitHub CopilotWindsurf

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.

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curl --request GET \  --url 'https://api.gunspec.io/v1/firearms/browning-auto-5' \  --header 'X-API-Key: your_key'
Response
{  "id": "browning-auto-5",  "name": "Browning Auto-5",  "manufacturer": {    "id": "browning",    "name": "Browning Arms Company",    "countryCode": "US",    "foundedYear": 1878,    "website": "https://www.browning.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 03:43:43",    "version": "5d8cf4fb4b938ebaed9e76da3c57ad4cd9f27d22ee35d8b2265942435fbb875c"  },  "category": {    "id": "shotgun",    "name": "Shotgun",    "description": "Smoothbore firearms designed to fire shot or slugs"  },  "country_of_origin": "BE",  "year_introduced": 1902,  "barrel_length_mm": 711,  "weight_empty_g": 3856,  "action_type": "long_recoil"}