Riley Defense RAK308-RPK
- Category
- Rifle
- Barrel
- 559 mm
- Weight, empty
- 4.99 kg
- Introduced
- 2024
About
What it is, and why it matters
The Riley Defense RAK308-RPK is a milled-receiver RPK-pattern rifle chambered in .308 Winchester, built on a Yugoslav M77B RPK surplus kit with American components for 922r compliance. It uses a TORTORT milled receiver, a 4150 nitride 22-inch heavy barrel (14x1 LH thread), forged and polished bolt and carrier, a three-position adjustable gas system, night-capable adjustable sights and an integral folding bipod, feeding from an original 20-round steel magazine.
Riley Defense builds AK-pattern rifles entirely in the United States from its facility in Fountain Valley, California - a rarity in a market long dominated by imported and surplus-built Kalashnikovs - using forged trunnions, bolts and carriers and fully heat-treated mil-spec receivers.
RAK308RPK. RPK-pattern heavy-barrel build with bipod on Yugo M77B surplus kits.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Riley Defense, Inc.
- Category
- Rifle
- Country
- United States
- Status
- In production
- Produced
- 2024
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 559 mm
- Overall length
- 1059 mm
- Weight, empty
- 4.99 kg
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Gas operated long stroke
- Firing mechanism
- Hammer fired
- Trigger
- Single stage
- Capacity
- 20
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Barrel
- Nitride steel
- Stock
- Wood
- Finish
- Blued
BallisticsFrom the service cartridge, not a handload.
- Effective range
- 549 m
- Maximum range
- 800 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.
Milled steel receiver
Forged bolt carrier
Rotating bolt
Side rail optic mount
Adjustable gas system- Built on surplus kit
Integral bipod
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 157 .308 Winchester rifles | 4.99 kg | 3.22 kg | Among the heaviest tenth |
| Overall lengthAmong 146 .308 Winchester rifles | 1059 mm | 1067 mm | Shorter than about 60% |
| Barrel lengthAmong 166 .308 Winchester rifles | 559 mm | 559 mm | Near the median |
| Magazine capacityAmong 162 .308 Winchester rifles | 20 | 5 | Among the largest capacities |
Answers
Questions about the Riley Defense RAK308-RPK
How much does the Riley Defense RAK308-RPK weigh?
The Riley Defense RAK308-RPK weighs 4.99 kg (11.00 lb) empty.
What caliber is the Riley Defense RAK308-RPK?
The Riley Defense RAK308-RPK is chambered in .308 Winchester.
How many rounds does the Riley Defense RAK308-RPK hold?
The Riley Defense RAK308-RPK holds 20 rounds, fed from a detachable box magazine.
How long is the Riley Defense RAK308-RPK?
The Riley Defense RAK308-RPK is 1059 mm (41.7 in) long overall, with a 559 mm (22.0 in) barrel.
Who makes the Riley Defense RAK308-RPK?
The Riley Defense RAK308-RPK is made by Riley Defense, Inc. (United States).
When was the Riley Defense RAK308-RPK introduced?
The Riley Defense RAK308-RPK was introduced in 2024.
How does the Riley Defense RAK308-RPK operate?
The Riley Defense RAK308-RPK uses a gas operated long stroke 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
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/riley-defense-rak308-rpk' \ --header 'X-API-Key: your_key'{ "id": "riley-defense-rak308-rpk", "name": "Riley Defense RAK308-RPK", "manufacturer": { "id": "riley-defense", "name": "Riley Defense, Inc.", "countryCode": "US", "foundedYear": 2009, "website": "https://rileydefense.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-05-26 23:17:02", "updatedAt": "2026-05-26 23:17:02", "version": "1b8c51dacae3294a3c00b6ec43081ab2641dda349b9fac5cc1b6eedc2c79c3f5" }, "category": { "id": "rifle", "name": "Rifle", "description": "Long-barreled firearms designed for accurate shooting" }, "country_of_origin": "US", "year_introduced": 2024, "barrel_length_mm": 559, "weight_empty_g": 4990, "action_type": "gas_operated_long_stroke"}