Specna Arms SA-FH06 FLEX™ Gen.2 is an excellent choice for players who want a reliable airsoft gun with modern technology at an affordable price. The updated FLEX Gen.2 series offers a ready-to-use package straight out of the box, combining high-quality internal parts, reinforced construction and easy maintenance.
Specna Arms FLEX series electric airsoft guns are especially suitable for beginner players or for those looking for a lightweight and agile gun.
The Specna Arms SA-FH06 FLEX™ is an H&K HK416 / AR15-based airsoft gun equipped with a RIS-style rail system as its handguard. In line with the FLEX series, the handguard is made from nylon-reinforced polymer, just like the rest of the body.
Internal Parts and Systems
Specna Arms FLEX Generation 2 brings parts solutions from Specna Arms’ flagship Prime series to Specna’s most affordable model line. FLEX Gen.2 is equipped with, among other things, the highly durable and upgrade-ready Ather gearbox and the Magnus TDC rotary-style hop-up chamber, which provides stable spin for the BB. Internal parts of this level have not previously been seen in the price range of the FLEX series.
- TDC Magnus™ Rotary Hop-Up chamber (patented), enabling precise and stable adjustment
- Helium™ Flat Hop bucking, which improves BB flight stability
- Ather™ gearbox with a reinforced shell and several practical features:
- Spring release function
- Pre-cocking and AoE inspection windows
- Heavily reinforced front section of the gearbox
- Adjustable trigger travel
- Factory-installed Specna Arms programmable HAL microcontroller, which protects internal parts, improves trigger response and battery life, and offers features such as adjustable pre-cocking
- Sealed aluminum nozzle
- 8 mm bushings
- Steel gears
- Polycarbonate piston with steel teeth
- Steel cut-off lever
HAL™ System Features
- Trigger detection with a magnetic sensor (Hall effect)
- Active brake
- Binary trigger
- Adjustable trigger sensitivity (5 levels, 20%–100%)
- Adjustable piston pre-cocking (6 levels)
- Programmable fire selector
- AUTO setting: full-auto, semi-auto, 3-round burst, 5-round burst
- SEMI setting: semi-auto, binary, AUG, sniper
- Easy programming via the trigger
- Low battery voltage warning
- Compatible with brushless motors
***The burst fire function in AUTO mode first fires a 3-round burst and then switches to full-auto.
ESA™ Quick Spring Change
As with other Specna Arms series, this model also features the ESA™ quick spring change system, allowing the gun to be easily adapted to the requirements of different game sites.
The factory-installed spring produces a muzzle velocity of approximately 120 m/s with 0.20 g BBs, making the gun ideal for medium-range engagements. An M90 spring is also included, which lowers the muzzle velocity to approximately 90 m/s with 0.20 g BBs, making the gun suitable for indoor CQB use.
Construction and External Parts
- The body, handguard, pistol grip and retractable stock are made from nylon-reinforced polymer
- The barrel, flash hider, charging handle, ejection port and controls are made from aluminum and ZnAl alloy
- All screws, pins, the ejection port, QD sling loop and slider are made from steel
- Lightweight construction and solid fitment – no unnecessary play between the body halves
Compatibility and Batteries
- Fully compatible with Li-Ion, LiPo and LiFe batteries
- Connector: Deans/T-plug. Mini Tamiya adapter included
Package Includes
- Specna Arms SA-FH06 FLEX™ HAL ETU Gen.2 electric airsoft gun
- S-Mag hi-cap magazine, 380 BB capacity
- M90 spring
- Cleaning rod
- Deans to Tamiya adapter
Note! Battery and charger are not included in the package.
Note! HAL™ Trigger Calibration Before First Use
This airsoft gun is equipped with the HAL™ system, and the trigger must be activated before using the gun. Activation is done as follows:

Setup:
1. Turn the fire selector to the “SAFE” position.
2. Connect the battery to the gun.
3. Wait three (3) seconds until the gun emits a “beep” sound.
4. Pull and hold the trigger for five (5) seconds until the gun emits a “beep” sound. This means that the trigger activation has been successful.
Read more:
HAL manual EN