Mossberg 505
- Category
- Shotgun
- Barrel
- 508 mm
- Weight, empty
- 2.38 kg
- Introduced
- 2005
About
What it is, and why it matters
The Mossberg 505 is a youth-sized pump-action shotgun built on a scaled-down version of the popular Mossberg 500 platform. Chambered for the .410 Bore with a 3-inch chamber, it pairs a 20-inch vent-rib barrel with a compact hardwood stock featuring a 12-inch length of pull and an EZ-Reach forend, making it well suited to smaller-framed and younger shooters learning wingshooting and small-game hunting. It retains the 500 series' top-tang safety, dual-extractor bolt and twin-shell anti-jam elevator while keeping overall weight around 5.25 pounds.
Introduced as the smallest member of Mossberg's Bantam youth line, the 505 was designed to give younger shooters a properly scaled shotgun rather than a cut-down adult gun, echoing the 500's reputation as an affordable, reliable pump.
Part of Mossberg's Bantam 500/505/510 youth family; the 505 is offered in both .410 Bore and 20 Gauge Youth configurations, with the .410 model carrying a fixed modified choke and four-round tubular 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
- 2005
- Variant of
- Youth/compact pump shotgun
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 508 mm
- Overall length
- 990 mm
- Weight, empty
- 2.38 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Pump action
- Firing mechanism
- Hammer fired
- Trigger
- Single action
- Capacity
- 4
- Magazine
- Tubular
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum alloy
- Barrel
- Steel
- Stock
- Hardwood
- Finish
- Blued
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 360 m/s
- Muzzle energy
- 907 J
- Effective range
- 35 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.
- Youth compact dimensions
12 inch length of pull
Ez reach forend
Vent rib barrel
Dual bead sights
Fixed modified choke
3 inch chamber
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 755 shotguns | 2.38 kg | 3.25 kg | Lighter than about 90% |
| Overall lengthAmong 678 shotguns | 990 mm | 1150 mm | Shorter than about 80% |
| Barrel lengthAmong 782 shotguns | 508 mm | 711 mm | Shorter than about 80% |
| Magazine capacityAmong 777 shotguns | 4 | 3 | Holds more rounds than about 70% |
Answers
Questions about the Mossberg 505
How much does the Mossberg 505 weigh?
The Mossberg 505 weighs 2.38 kg (5.25 lb) empty.
What caliber is the Mossberg 505?
The Mossberg 505 is chambered in .410 Bore.
How many rounds does the Mossberg 505 hold?
The Mossberg 505 holds 4 rounds, fed from a tubular magazine.
How long is the Mossberg 505?
The Mossberg 505 is 990 mm (39.0 in) long overall, with a 508 mm (20.0 in) barrel.
Who makes the Mossberg 505?
The Mossberg 505 is made by O.F. Mossberg & Sons (United States). It was designed by O.F. Mossberg & Sons.
When was the Mossberg 505 introduced?
The Mossberg 505 was introduced in 2005.
How does the Mossberg 505 operate?
The Mossberg 505 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
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/mossberg-505' \ --header 'X-API-Key: your_key'{ "id": "mossberg-505", "name": "Mossberg 505", "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": 2005, "barrel_length_mm": 508, "weight_empty_g": 2381, "action_type": "pump_action"}