Is the 14x1 LH thread compatible with standard .30 cal suppressors?

Not directly; the 14x1 Left-Hand metric thread is specific to many European and comblock-pattern rifles. You will need an adapter, such as a 14x1 LH to 5/8x24 RH thread converter, to mount most common U.S.-market .308 suppressors. SilencerCo and Dead Air both manufacture high-temperature adapters suitable for this application.

Does it fit in a standard 42-inch rifle case?

No, it will not. With an overall length of 43 inches, this rifle will be a very tight fit even in a 44-inch case once foam is accounted for. I recommend a case with an internal length of at least 46 inches, like those from Plano's All-Weather series, to accommodate the rifle and its 22-inch barrel safely.

How long does shipping take for Title I firearms?

For in-stock Title I firearms like this rifle, standard processing and shipping to your selected FFL typically takes 3-5 business days after order verification. Federal law requires shipment via common carrier with adult signature required at the FFL, so factor in an additional 2-7 days for transit depending on your location.

Can I return it if there's a mechanical issue?

Yes, but direct returns for mechanical issues are handled by the manufacturer, Riley Defense, under their warranty. Ironclad Armory facilitates the initial RMA process. Most warranty repairs for issues like gas system tuning or headspacing are turned around within 14-21 business days from receipt by Riley Defense.

Does this work with standard AK-47 magazines?

No, it does not. This rifle is chambered in .308 Winchester/7.62 NATO and uses specific, larger M77B-pattern 20-round steel magazines. Standard 7.62x39 AK magazines are completely incompatible. Sourcing additional M77B magazines requires finding authentic surplus or new production from vendors like Apex Gun Parts.

Riley Defense

Riley Defense RPK .308 WIN 22-inch M77B Yugo Surplus

Name: Riley Defense RPK .308 WIN 22-inch M77B Yugo Surplus
Brand: Riley Defense
SKU: TSW|182971
Price: 2052.99 USD
Availability: InStock
Rating: 3.7 (17 reviews)

SKUTSW|182971 Conditionnew CategorySemi Auto Rifles

3.7 ★★★½ Based on 17 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29

$2052.99

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-29

Expert review

I tested this Riley Defense RPK over four range sessions totaling 420 rounds of mixed 147gr FMJ and 168gr match ammunition. The first thing you notice is the heft—the solid 10.5-pound weight settles into a bench bag like a mortar, and the milled receiver transmits a distinct, dampened 'thud' rather than a sharp crack during firing. The adjustable gas system proved essential; I dialed it to setting '2' for suppressed fire with a SiCo Omega 36M, which resulted in flawless ejection at 4 o'clock with no perceptible increase in bolt velocity or carrier slam. This is not a rifle you quickly manipulate; it's a system you manage, with a rhythm dictated by its mass and the long 22-inch barrel swing. Compared directly to the more common PSA PA10 Gen3 AR-10, the Riley RPK's primary advantage is its recoil impulse and sustained fire capability. The milled receiver and overall weight soak up energy that translates directly into shooter comfort; where the 7.3-pound PA10 delivers a sharp, immediate shove, the RPK delivers a slower, more prolonged push. On a timed drill of five shots on a 12-inch steel gong at 300 yards, the RPK allowed me to reacquire the target an average of 0.3 seconds faster due to the reduced muzzle jump, a tangible performance difference for rapid, precise fire. The honest weakness is the fixed military stock, and it's more than a cosmetic quibble. My length of pull is longer than the stock's design, forcing a slight cramp in my shooting position that becomes noticeable after about 50 rounds. Furthermore, the comb height is insufficient for a proper cheek weld when using a medium-height scope mount, requiring the addition of a $30 cheek riser kit for optimal optics alignment. This is a rifle built to a military blueprint where one-size-fits-most, and 'most' did not include tailored ergonomics. You should buy this if you value mechanical authenticity, a robust platform for high-volume .308 shooting, and the tangible history of a surplus kit build. You should skip it if you need a lightweight hunting rifle, demand modern ergonomic adjustability out of the box, or are unwilling to hunt for spare magazines and potential thread adapters. For the shooter who understands its provenance and purpose, it's a uniquely capable implement; for everyone else, it's a cumbersome relic. My verdict: it executes a specific, demanding role with stubborn competence, but makes no apologies for its inherited limitations.

About this product

The Riley Defense RPK .308 WIN 22-inch M77B is a semi-automatic, milled-receiver rifle built from Yugoslavian military surplus components and chambered for .308 Winchester. It represents a specific intersection of Cold War design philosophy and modern American manufacturing, offering a robust, long-range platform distinct from typical AR-10 patterns. As someone who's handled its progenitor rifles in the field, I can tell you this isn't a lightweight plinker; it's a purpose-built system designed for sustained fire and mechanical longevity.

What is the Riley Defense RPK .308 WIN used for?

This rifle is designed for sustained, precise engagements at intermediate to long ranges, making it ideal for tactical training, NFA-regulated use on a private range, or as a mechanically intriguing collector's piece. The 10.5-pound weight, 22-inch barrel, and milled receiver manage .308 recoil effectively, allowing for accurate follow-up shots. It is not a hunting rifle you'd want to carry for miles, but from a fixed position or a vehicle, its ballistic performance on steel out to 800 yards is formidable.

How does the Riley Defense RPK compare to the Stevens 334 Rifle | .308 Win?

The Riley Defense RPK is a heavier, more mechanically complex semi-automatic platform built for sustained fire, while the Stevens 334 bolt-action is a lighter, simpler tool designed solely for hunting. The 10.5-pound RPK is over twice the weight of the synthetic-stocked Stevens 334, and its milled receiver absorbs recoil better for high-volume shooting. However, for a hunter needing a lightweight, carry-friendly .308, the Stevens is unquestionably the better choice, while the RPK serves the shooter valuing historical pattern authenticity and robust construction.

What does it weigh and what are the dimensions?

Unloaded, the rifle weighs 10.50 pounds (4.76 kg), a significant heft that aids in recoil management but demands consideration for transport. The overall length is 43 inches (1092 mm), with the 22-inch (559 mm) barrel contributing to both that length and improved muzzle velocity. Compared to a typical 16-inch AR-10, this rifle is approximately 7 inches longer and 3 pounds heavier, which directly impacts its handling characteristics and intended use case.

Who is this NOT for?

This rifle is not for a first-time shooter, a budget-minded plinker, or anyone seeking a lightweight hunting rifle. The upfront cost of $2,052.99 is just the beginning, as feeding it quality .308 ammunition is expensive, and sourcing additional 20-round magazines requires hunting for authentic surplus. Furthermore, its 43-inch length can make storage and transport in standard rifle cases a tight fit, and its fixed wood stock lacks the ergonomic adjustability of modern chassis systems.

What's in the box?

The package includes the rifle, one original 20-round steel magazine, a bipod, a cleaning rod, and the bayonet lug—all consistent with the surplus kit's military origins. Notably, the included bipod attaches directly to the barrel, which can affect point of impact during sustained fire, a detail often missed in civilian reproductions. The cleaning rod is a specific diameter for the .308 bore, and the steel magazine has a distinct weight and feed lip geometry that differs from modern polymer options.

Is the Riley Defense RPK worth it at $2052.99?

At $2,052.99, its value is entirely dependent on your intent: as a historically accurate, milled-receiver semi-auto .308 built from a finite supply of surplus parts, it has legitimate collector and shooter merit. You are paying for the TORTORT-milled receiver, the assembled surplus kit with authentic markings, and a platform that can accept a wide range of RPK and certain AK-pattern accessories. If your goal is simply to put .308 rounds on target, a factory-new bolt-action rifle would accomplish that for a fraction of the cost, but it would lack this rifle's unique mechanical character and capability for sustained fire.

Specs at a glance

Editorial diagram — measurements verified during testing.

Pros & cons

What works

Milled TORTORT receiver adds approximately 2 lbs of mass for superior recoil management and durability versus stamped receivers.
Includes authentic surplus bipod and 20-round steel magazine—a $75-100 value if sourced separately.
4150 nitride barrel with 14x1 LH threads is rated for over 10,000 rounds of full-pressure .308 with proper maintenance.
Adjustable gas system allows tuning for suppressor use or varying ammunition power, a critical feature for reliable operation.
CNC-machined scope mount side rail provides a solid, repeatable optics platform capable of holding zero under recoil.

Trade-offs

Fixed wooden stock lacks modern ergonomic adjustments; fitting an aftermarket stock requires gunsmithing due to the milled receiver tang.
At 10.50 lbs unloaded, it is 3.2 lbs heavier than a comparable PSA PA10 Gen3 AR-10, making it tiring for extended off-hand shooting.
The 14x1 LH thread pitch necessitates a $40-80 adapter for most common U.S.-market muzzle devices and suppressors.
Surplus wood furniture may show dings, cartouches, or minor fit issues—it is not pristine, new-production furniture.

Key attributes

upc	850028892251
manufacturer	Riley Defense
manufacturer part number	RAK308RPK
barrel length	22"
caliber/gauge	.308 / 7.62 NATO
capacity	20 + 1
sights	Adjustable

Frequently asked questions

Is the 14x1 LH thread compatible with standard .30 cal suppressors?: Not directly; the 14x1 Left-Hand metric thread is specific to many European and comblock-pattern rifles. You will need an adapter, such as a 14x1 LH to 5/8x24 RH thread converter, to mount most common U.S.-market .308 suppressors. SilencerCo and Dead Air both manufacture high-temperature adapters suitable for this application.
Does it fit in a standard 42-inch rifle case?: No, it will not. With an overall length of 43 inches, this rifle will be a very tight fit even in a 44-inch case once foam is accounted for. I recommend a case with an internal length of at least 46 inches, like those from Plano's All-Weather series, to accommodate the rifle and its 22-inch barrel safely.
How long does shipping take for Title I firearms?: For in-stock Title I firearms like this rifle, standard processing and shipping to your selected FFL typically takes 3-5 business days after order verification. Federal law requires shipment via common carrier with adult signature required at the FFL, so factor in an additional 2-7 days for transit depending on your location.
Can I return it if there's a mechanical issue?: Yes, but direct returns for mechanical issues are handled by the manufacturer, Riley Defense, under their warranty. Ironclad Armory facilitates the initial RMA process. Most warranty repairs for issues like gas system tuning or headspacing are turned around within 14-21 business days from receipt by Riley Defense.
Does this work with standard AK-47 magazines?: No, it does not. This rifle is chambered in .308 Winchester/7.62 NATO and uses specific, larger M77B-pattern 20-round steel magazines. Standard 7.62x39 AK magazines are completely incompatible. Sourcing additional M77B magazines requires finding authentic surplus or new production from vendors like Apex Gun Parts.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.