RDI RAK556 5.56 POLY KRINK W/SIDE FOLD STOCK

RDI RAK556 5.56 POLY KRINK W/SIDE FOLD STOCK

RILEY DEFENSE
SKU:
126821132
|
UPC:
850028892343
$1,161.25
Current Stock:
Product Specifications
Barrel Length:
6.5"
Caliber-Gauge:
223 Remington / 5.56 NATO
Product Overview

The Riley Defense RAK556 5.56 Poly Krink is a semi-automatic pistol built on proven AK-pattern mechanics and chambered in 5.56x45mm. At 21 inches overall length, it splits the difference between a compact firearm and something with enough sight radius and barrel length to deliver serious velocity—making it equally at home as a truck gun, range toy, or specialized close-quarters platform. The "Krink" legacy means a gun engineered for function over frills, and this model proves it with forged trunnion, bolt, and carrier components that can handle hard use without apology.

This particular variant comes set up with a plugged and pinned 100-series side-folding rear trunnion (4.5mm), giving you the foundation for a folding-stock configuration if you decide to go that direction later. The 8.5-inch chrome-lined barrel pairs with a 4-piece muzzle brake to manage recoil and keep the platform controllable. Cooling and grip are addressed with a serrated upper handguard for sure purchase and a stainless steel heat shield on the lower handguard, all crowned by a tactical pistol grip. The receiver is fully heat-treated mil-spec stamped steel, and you get a hinged dust cover, bolt hold-open safety lever, extended mag release, and a machined scope-mount side rail for optics or accessories. Semi-automatic closed-bolt operation, 30-round magazine capacity, and a spring-loaded firing pin round out the core package.

If you're drawn to AK ergonomics and reliability but want a compact 5.56 platform with genuine parts-quality and proper heat-treatment standards, the Riley Defense Krink delivers without the marketing noise. It's a working gun for shooters who know what they want.

Key Features

  • Semi-automatic 5.56x45mm with 8.5-inch chrome-lined barrel
  • Forged trunnion, bolt, and carrier for durability
  • Fully heat-treated mil-spec stamped receiver
  • 4-piece muzzle brake for recoil management
  • 100-series side-folding rear trunnion (plugged and pinned, ready for stock upgrade)
  • Serrated upper handguard and stainless steel heat shield
  • Hinged dust cover and bolt hold-open safety lever
  • Machined scope-mount side rail for optics mounting
  • Extended magazine release for easier handling
  • Black oxide finish

Specifications

Caliber5.56x45mm
Barrel Length8.5 inches
Barrel Material4150 Nitride, chrome-lined
Overall Length21 inches
ReceiverMil-spec stamped steel, fully heat-treated
TrunnionForged; 100-series side-folding rear (plugged and pinned, 4.5mm)
BoltForged
CarrierForged, chrome-lined piston
ActionSemi-automatic, closed-bolt
Firing PinSpring-loaded
Magazine Capacity30 rounds
Muzzle Device4-piece muzzle brake
FinishBlack oxide

Frequently Asked Questions

Can I add a folding stock to this gun?

The RAK556 comes with a plugged and pinned 100-series side-folding rear trunnion (4.5mm), which means it's set up to accept a compatible folding stock if you choose to add one later.

What's included in the box?

The gun ships with the pistol configured as described—trunnion and components included. It does not come with a side-folding stock installed; that's a separate upgrade if desired.

Is this a true AK-pattern platform?

Yes. The RAK556 is built on AK mechanics: stamped receiver, forged trunnion/bolt/carrier, and side-rail mounting. It chambers 5.56x45mm and operates as a semi-automatic closed-bolt rifle.

What's the practical use for an 8.5-inch 5.56 pistol?

With its compact 21-inch overall length and proven AK-pattern reliability, it works as a truck gun, range platform, or specialized short-distance carbine. The 8.5-inch barrel still delivers meaningful velocity while keeping the gun maneuverable.

Additional Information

Firearm Shipments:

To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.

We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.

We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.

Email: [email protected]

  • Prior to placing an order, it is the buyer's responsibility to understand and adhere to their state's firearm regulations.
  • The buyer should verify with their receiving dealer that the chosen firearm is legally permissible in their state.
  • The buyer is accountable for any transfer fees or background check charges imposed by the receiving dealer. If the designated dealer declines to accept the firearm delivery, the buyer assumes responsibility for shipping costs to retrieve the firearm and resend it to an accommodating dealer.
  • Handguns will be shipped using air transportation, while long guns can be shipped using ground methods. If your order includes a mix of firearm and non-firearm items, BOSQUE Outdoors will send the firearm(s) to your selected FFL dealer and the remaining non-firearm items to your billing address.
  • Firearms cannot be returned to BOSQUE Outdoors; please contact the manufacturer for warranty claims.
  • Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check are subject to a $75 restocking fee plus 10% of the purchase price.