Mossberg 590M
- Category
- Shotgun
- Barrel
- 470 mm
- Weight, empty
- 3.35 kg
- Introduced
- 2018
About
What it is, and why it matters
The Mossberg 590M is a pump-action 12 gauge shotgun that replaces the traditional tubular magazine with a detachable double-stack box magazine, feeding from 5-, 10-, 15-, or 20-round mags for rapid reloads. Built on Mossberg's combat-proven 590 platform, it keeps the dual extractors, ambidextrous top-tang safety, and aluminum receiver while adding magazine-fed capacity for home defense and tactical use.
Mossberg's 590 series earned a reputation passing the demanding U.S. Mil-Spec 3443E torture test; the 590M adapted that rugged pump action to box magazines just as magazine-fed shotguns surged in popularity for defensive use.
The 590M is part of the Mag-Fed line; magazine capacity varies by magazine fitted (5/10/15/20 rounds). Listed capacity reflects the common 10-round magazine.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- O.F. Mossberg & Sons
- Category
- Shotgun
- Country
- United States
- Status
- In production
- Produced
- 2018
- Variant of
- Magazine fed
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 470 mm
- Overall length
- 1035 mm
- Weight, empty
- 3.35 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Pump action
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 10
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Matte blue
BallisticsFrom the service cartridge, not a handload.
- Effective range
- 40 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.
Detachable box magazine
Dual extractors
Ambidextrous safety
Ghost ring sights
Picatinny rail
Synthetic stock
Heat shield optional
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 622 12 Gauge shotguns | 3.35 kg | 3.29 kg | Heavier than about 60% |
| Overall lengthAmong 570 12 Gauge shotguns | 1035 mm | 1150 mm | Shorter than about 70% |
| Barrel lengthAmong 650 12 Gauge shotguns | 470 mm | 711 mm | Shorter than about 90% |
| Magazine capacityAmong 647 12 Gauge shotguns | 10 | 3 | Holds more rounds than about 90% |
Answers
Questions about the Mossberg 590M
How much does the Mossberg 590M weigh?
The Mossberg 590M weighs 3.35 kg (7.39 lb) empty.
What caliber is the Mossberg 590M?
The Mossberg 590M is chambered in 12 Gauge.
How many rounds does the Mossberg 590M hold?
The Mossberg 590M holds 10 rounds, fed from a detachable box magazine.
How long is the Mossberg 590M?
The Mossberg 590M is 1035 mm (40.7 in) long overall, with a 470 mm (18.5 in) barrel.
Who makes the Mossberg 590M?
The Mossberg 590M is made by O.F. Mossberg & Sons (United States).
When was the Mossberg 590M introduced?
The Mossberg 590M was introduced in 2018.
How does the Mossberg 590M operate?
The Mossberg 590M uses a pump action, and its firing mechanism is hammer 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
70%
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/mossberg-590m' \ --header 'X-API-Key: your_key'{ "id": "mossberg-590m", "name": "Mossberg 590M", "manufacturer": { "id": "mossberg", "name": "O.F. Mossberg & Sons", "countryCode": "US", "foundedYear": 1919, "website": "https://www.mossberg.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-11 23:44:40", "updatedAt": "2026-02-18 03:40:45", "version": "efbce48d45f2bf96c91e5b66c03052b97d55affea9178a31feda8fd7fc882671" }, "category": { "id": "shotgun", "name": "Shotgun", "description": "Smoothbore firearms designed to fire shot or slugs" }, "country_of_origin": "US", "year_introduced": 2018, "barrel_length_mm": 470, "weight_empty_g": 3350, "action_type": "pump_action"}