The Specna Arms FLEX™ Gen.2 series was designed to deliver the best possible user experience at an attractive price. The SA-FX01 is a true “take it out of the box and hit the field” carbine, featuring upgrades typically found in higher-end replicas. This version is topped off with the Specna Arms Dark Matter™ High Speed 27k brushless motor, bringing fast response and efficient drive to a modern ETU-controlled setup.
Key features
-
TDC Magnus™ Rotary Hop-Up (Top Down Center) – very accurate and stable hop adjustment
-
Helium™ Flat Hop Eraser – improves consistency and effective range
-
Sealed aluminum nozzle – better air seal and more consistent operation
-
ESA™ quick spring change – adjust power quickly without specialized tools
-
Dark Matter™ 27k High Speed brushless motor – powerful, fast motor for a modern build
-
Light yet reinforced construction – nylon-fiber reinforced polymer keeps the replica durable and lightweight
-
Excellent for CQB / dynamic play – low weight and tight overall fit
Ather™ Gearbox (reinforced)
-
Mainspring release function
- Pre-cocking and AoE inspection windows
- Reinforced front
-
Inspection windows for easier service / setup
- Trigger adjustment function
-
Frame alignment screw holes – helps fine-tune gearbox alignment
- Ready for M140 springs
HAL™ ETU (Hall Effect) – functions
-
Magnetic trigger detection (Hall effect) – fast, precise response
- Active Brake
- Binary trigger
-
Adjustable trigger sensitivity – 5 levels (20–100%)
-
Adjustable pre-cocking – 6 levels
-
AUTO programmable fire modes – full auto / semi / 3-round burst / 5-round burst
-
SEMI programmable fire modes – semi / binary / AUG / sniper
- Easy programming via the trigger
- Low battery warning
- Compatible with brushless motors
Note: In AUTO, the replica fires a 3-round burst first and then switches to full auto.
Build & ergonomics
The externals focus on low weight and durability. The barrel assembly, free-float front, receiver parts, Light Ops stock, and pistol grip are made from nylon-fiber reinforced polymer. Key metal parts (including the barrel components, flash hider, enlarged charging handle and controls) use aluminum and zinc alloys, while high-stress small parts (bolts, pins, ejection port parts) are steel. The overall fit is tight, with minimal wobble between the upper and lower receiver.
Internals (manufacturer listed)
- 8 mm bearings
- Steel gears
-
Polycarbonate piston with full steel teeth
- 6.03 mm precision inner barrel
-
TDC Magnus™ chamber, Helium™ Flat Hop, sealed aluminum nozzle
- Specna Arms Dark Matter™ High Speed 27k brushless motor
Package includes
- Airsoft replica
- 2 x S-MAG Mid-Cap magazine
- Cleaning rod
- Allen key
- Small Tamiya to Deans adapter
- BB speedloader
- Extra spring: M90
Not included
Note: Calibrating the HAL™ trigger before use:
This airsoft gun is equipped with the HAL ™ system and before using the gun, the trigger must be activated. Activation is done as follows:
 |
Introduction: 1. Turn the gun's 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. Press the trigger all the way down for five (5) seconds until the gun emits a "beep" sound. This indicates that the trigger has been successfully activated. |
Link:
HAL manual_EN
Item Attributes
| Gearbox version |
Gearbox v2 |
| Hop-Up |
Yes |
| Product weight [g] |
2000 |
| Material |
Plastic |
| Length minimal [mm] |
670 |
| Product length [cm] |
76 |
| Power supply |
Electric |
| Colour |
Pink |
| Manufacturer model code |
SA-FX01-ETU-PK-G2-BLDC |
| MOSFET/ETU |
Yes |
| Muzzle velocity [FPS] |
400 |
| Velocity [m/s] |
121.92 |
| Blow Back |
No |
| Battery included |
No |
| Quick Spring Change system |
Yes |
| Type of plug |
DEANS / T-connect |
| Type of thread on the barrel |
14mm CCW |
| Fire mode |
Semi-auto |
| Inner barrel length [mm]. |
229 |
| Magazine capacity [pcs.] |
120 |
| Made of |
Polymer and metal |
| Specna Arms Line |
FLEX™ |