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Tradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger SystemTradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger System
824,90 €
Recommended price
899,70 €

Incl. taxExcl. tax

Shipping costs?

Shipping costs are calculated automatically based on the total value of your shopping cart.


Orders placed before 1 pm (Eastern European Time)
will be shipped out on the same (Matkahuolto, GLS) or following (Posti) business day. Orders that contain installations or upgrade services will be shipped out after the job is complete.

Delivery on?

These are estimated delivery dates. Please take into account that orders are normally not transported on holidays and weekends. The order can be collected during the opening hours of your nearest pickup point. You can track your order with the tracking number found in the order confirmation email.

Tradesoft Customs Leviathan RK 95 TP (GK99) with Microcontroller Unit and RFTS Two-Stage Trigger System

Return Of The Jedi - RK95

We decided to fill the great void inside and ordered a large batch of replicas straight from Taiwan to Turku, Finland!

At the same we with G&G desided to make some upgrades inside:

  • Approximately 1.6 J output spring.
  • Ifrit neodymium motor with specs at 17 TPA and 25k RPM.
  • The replica also sports the Tradesoft Customs handguard. Larger batteries fit inside like baguette into a stadium - so much room it almost looks lonely.
  • The Tradesoft Customs model is additionally equipped with a RetroArms reinforced steel-toothed piston, meaning you dont have to worry about nothing else than playing hard!

GK99/RK95 TP - Tradesoft Customs

When the Finnish Defense Forces do something, Tradesoft follows suit! Following the Defence Forces' example, we upgraded the RK to the next decade: namely, this beast has a JeffTron Leviathan microcontroller unit inside. With Leviathan, we also installed the JeffTron Two-Stage trigger as custom job, so what are the benefits here?

The two-stage trigger is 3D-printed block and a spring steel leaf spring that mimics the behavior of a 2-stage trigger in a real gun (Real Feel Trigger System). With it you know exactly when the shot is released. This solution was designed by gunsmith Tomas Linhart, just like other solutions in the Jefftron RFTS family. The trigger pull of an AEG can't get much more realistic than this!

By default this system is compatible with RetroArms gearboxes, but by little bit of inside-and-outside-the-gearbox-thinking we managed to fit it reliably into the G&G gearbox!

Note! We usually have a few ready, but if the demand surges we might run out of ready made ones and delivery time will be a few days longer. If this happens, the shopping cart page will display our current estimate.

Leviathan - from JeffTron, not Hobbes

Leviathan Optical is one of the most advanced ETUs (Electronic Trigger Unit) on the market. The settings can be tinkered with via Bluetooth with basically any iOS or Android smart phone. Leviathan replaces the traditional trigger switch - no soldering needed! In general this bad boy gives you new features and upgrades the replica to a new level.

V2 gearbox version is supplied with aluminum adjustable CNC machined special trigger making it possible to adjust the trigger pull to only 0.13 mm! It is also possible to use the replica's original trigger with the unit, but this requires modifying the trigger. Fortunately, the manufacturer has very clear pictured instructions for this!

Note! V3 Leviathan does not come with a trigger, but by default the replica's standard trigger is used. However, there are hair trigger padding pieces (2x1 mm and 2x2 mm) delivered with the unit, that can be used to shorten the trigger pull.


  • Fully adjustable fire modes, including SAFE.
  • Three different burst fire modes. These are adjustable between 2 and 20 shots.
  • Empty magazine detection.
  • Rate of fire (RoF) can be limited down to -40% of the original
  • Adjustable active brake. Can also be disabled completely.
  • Spring precocking with semi. This makes shots practically instant.
  • Optional delay between shots (Sniper Delay). The interval can be set between 0.1 to 4.0 seconds.
  • Electronic fuse with adjustable sensitivity.
  • Battery too low voltage indicator. This works with 2S-4S/7,4-14,8 V LiPo and 3S-4S / 9,9-13,2 V LiFe batteries.
  • A virtual magazine mode to simulate a low/real cap magazine.
  • Power connector for external accessories, like tracer units attached to hop-up.
  • Comprehensive statistics available, like cycle timing, motor power consumption and rate of fire.
  • The app shows the actual battery voltage in real time.
  • The user can save several different configurations in different profiles.
  • The operating system can be updated. Updates often fix issues and add new features to the unit.
  • 3 different shot counters: the first counts all shots during the device's lifetime, the second can be reset by the user e.g. after maintenance, and the third is reset every time the battery is removed from the device.
  • The error log shows the problems that have arisen during the use of the device.
  • The wireless Bluetooth connection can be disabled. Security is the key!
  • The device monitors the current, voltage and temperature of the unit, protecting itself from damage in possible failure situations.
  • The programmed settings are saved in real time.

Installing and using:

  • Installing the device inside a gearbox requires an understanding and knowledge of airsoft replica's inner workings - when in doubt, consult a professional.
  • Read the user manual carefully before installing the Leviathan unit.
  • A short circuit or incorrectly connected battery will break the unit immediately! Incorrect connection voids the warranty and can have fiery results with the battery!
  • Always remove the battery from the replica when the replica is not in use! Otherwise, the unit will gradually drain your battery, in which case the battery may break. (When the battery is connected, Leviathan consumes the battery with a small current in stand by mode.)
  • Always ensure the safe orientation of the barrel before connecting the battery!
  • Do not modify or repair the Leviathan V2 circuit or expose it to liquids or heat.

Six months of warranty

The Tradesoft Customs products are always granted a six-month warranty. In practice this means that if the product breaks within six months from the date of purchase, we either fix it or replace it. Note, however, that the warranty does not cover normal wear or misuse.


The RK 95 TP airsoft version originated when G&G asked airsoft players which gun model they would like to see in airsoft next. The players voted for the Finnish assault rifle as number one choice and so G&G ended up making it under the gun model name GK99. The gun was made from blueprints and photographs using 3D modeling, and the required dimensions were changed, so that the necessary airsoft components could fit inside.

The body and outer barrel of the gun are made of aluminum. The receiver cover, folding stock, trigger guard and magazine release, selector switch, gas tube, front retainers, gas block adjustment lever, rear sight’s diopter part and flash suppressor are made of steel. The pistol grip, handguard, magazine and the folding stock coating are plastic. On the inside, there is a G&G version 3 gearbox, which has a pneumatic blowback. The pneumatic blowback is neat, because it doesn’t cause any extra resistance for the gears and the motor like mechanical blowbacks do. Instead, the blowback works with air pressure, because there is an extra cylinder above the gearbox, which gets air from the main cylinder. As a result, we have a blowback mechanism that reacts to the piston’s movements and doesn’t strain the other parts.

The gun is compatible with AK series' magazines. However, because of the magwell’s dimensions, we recommend checking that the bigger magazines (e.g. CYMA AK magazines) fit carefully before forcing the magazine in place. We have found that the CYMA and MAG waffle pattern magazines are suitable and work great.

We spared you the trouble and modified the hand guard, so that you can fit e.g. a Battery Ram 11.1V 2000mAh crane type battery or even a 11.1V 2600mAh LiPo type crane battery inside.

Onwards, march!

History of the real gun

In the late 1980’s, The Finnish Defense Forces started a project to improve the RK 62 assault rifle’s firing features and rate of fire. As a result, the RK 95 TP was born. In the new model, the gun’s recoil has been decreased with a muzzle break and it is more easily handled when using automatic fire. Other features are for example a folding stock, easily adjustable sights, attachment possibility for a rail and the ability to shoot rifle grenades.

The RK 95 TP is used by the Finnish Defense Forces and especially the special forces, crisis management units and operative units. Thus, this gun is familiar to all Finns who have completed their general conscription or voluntary military service.

Remember to get a suitable battery and charger

Battery and charger are not included with this gun. To make sure the warranty of your gun is valid, you may use LiPo batteries with a maximum nominal voltage of 11.1V LiPo/Li-Ion or NiCd/NiMH batteries of up to 12V. The maximum capacity should be under 3100mAh. Using a battery with a higher nominal voltage or capacity voids the warranty. Note! You may still use 7.4V LiPo/Li-Ion or 8.4V and 9.6V NiCd/NiMH batteries with the gun.

Are you not sure which battery fits in your gun? Check the nickel battery compatibility table in Tradetech.

The mechanic's choice for the battery would be a 7.4V LiPo battery with a capacity of about 2000mAh, so that the full auto remains moderate, but thanks to the pre-cocking, the semi-delay is kept to a minimum!

Each gun individually tested by us:

The functionality of all our guns is tested and the muzzle velocity measured before shipping. The velocity is measured with a 0.20 g BB and the final muzzle velocity is calculated from the average of five (5) shots. In fact, the muzzle velocities you see in our online shop are approximations reported by the supplier or manufacturer. Thus, the actual muzzle velocity of your gun may differ from the approximation upwards or downwards. However, we always mark the final muzzle velocity on the maintenance and user manual provided with the gun.

Name: Tradesoft Customs Leviathan RK95 TP (GK99) with Microcontroller Unit and Two-Stage Trigger
Product code: TSC-GK99-LEVIATHAN
Manufacturer: G&G
Color: Black
Muzzle energy: 1.55 J
Muzzle velocity: 124 m/s
Body/receiver: Metal
Magazine size and type: 600, hicap
Gearbox: Version 3
Hop-up: Adjustable
Blowback: Yes
Gun length: 685/930 mm
Barrel length: 400 mm
Weight: 3055 g
Power source: Electric
Compatible battery/gas type: Crane/LiPo
Motor: Short
Fire modes: Semi/Burst/Full-auto, adjustable
Package contents: Gun, magazine, Leviathan mosfet unit & RetroArms piston installed
Supplier product code: TSC-GK99-LEVIATHAN

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