Grand Power GP-M4
- Category
- Assault Rifle
- Barrel
- 368 mm
- Weight, empty
- 2.78 kg
- Introduced
- 2022
About
What it is, and why it matters
The Grand Power GP-M4 is a select-fire assault rifle on the AR-15/M4 platform chambered in 5.56x45mm NATO. A robust and reliable direct impingement design accepting standard STANAG magazines, it is offered to military and law enforcement customers. Available with barrel lengths from 11 to 20 inches.
Military/law enforcement only. Uses standard AR-15/M4 STANAG magazines. Overall length 706mm with collapsed stock.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Grand Power
- Category
- Assault Rifle
- Country
- Slovakia
- Status
- In production
- Produced
- 2022
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 368 mm
- Overall length
- 706 mm
- Height
- 187 mm
- Width
- 69 mm
- Weight, empty
- 2.78 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated direct impingement
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 30
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum
- Barrel
- Steel
- Stock
- Polymer
- Finish
- Anodized
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 940 m/s
- Muzzle energy
- 1776 J
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.
Collapsible stock- Stanag compatible
Select fire
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 158 5.56x45mm NATO assault rifles | 2.78 kg | 3.60 kg | Among the lightest tenth |
| Overall lengthAmong 156 5.56x45mm NATO assault rifles | 706 mm | 920 mm | Shorter than about 90% |
| Barrel lengthAmong 157 5.56x45mm NATO assault rifles | 368 mm | 449 mm | Shorter than about 80% |
| Magazine capacityAmong 158 5.56x45mm NATO assault rifles | 30 | 30 | Near the median |
Its place in the rankings
Answers
Questions about the Grand Power GP-M4
How much does the Grand Power GP-M4 weigh?
The Grand Power GP-M4 weighs 2.78 kg (6.14 lb) empty. It is the 2nd lightest of 158 5.56x45mm NATO assault rifles in the catalogue.
What caliber is the Grand Power GP-M4?
The Grand Power GP-M4 is chambered in 5.56x45mm NATO.
How many rounds does the Grand Power GP-M4 hold?
The Grand Power GP-M4 holds 30 rounds, fed from a detachable box magazine.
How long is the Grand Power GP-M4?
The Grand Power GP-M4 is 706 mm (27.8 in) long overall, with a 368 mm (14.5 in) barrel.
Who makes the Grand Power GP-M4?
The Grand Power GP-M4 is made by Grand Power (Slovakia).
When was the Grand Power GP-M4 introduced?
The Grand Power GP-M4 was introduced in 2022.
How does the Grand Power GP-M4 operate?
The Grand Power GP-M4 uses a gas operated direct impingement 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
78%
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/grand-power-gp-m4' \ --header 'X-API-Key: your_key'{ "id": "grand-power-gp-m4", "name": "Grand Power GP-M4", "manufacturer": { "id": "grand-power", "name": "Grand Power", "countryCode": "SK", "foundedYear": 2002, "website": "https://grandpower.eu", "logoUrl": null, "description": null, "status": "active", "defunctYear": null, "stateOwned": null, "makesFirearms": true, "parentId": null, "predecessorId": null, "createdAt": "2026-02-18 03:40:45", "updatedAt": "2026-02-18 03:40:45", "version": "35f9d57a67628c2e914d31a8e6a7dbce343e50039bdf42a585588e12a88143d0" }, "category": { "id": "assault-rifle", "name": "Assault Rifle", "description": "Selective-fire rifles chambered in intermediate cartridges" }, "country_of_origin": "SK", "year_introduced": 2022, "barrel_length_mm": 368, "weight_empty_g": 2783, "action_type": "gas_operated_direct_impingement"}