Specna Arms SA-FX01 FLEX™ HAL ETU Gen.2 airsoft Carbine - Half-Tan

The Specna Arms FLEX™ Gen.2 series was developed 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: a precise TDC rotary hop-up, quality internal components, and the HAL ETU control unit with multiple fire modes and on-board tuning.

Key features

• TDC Magnus™ Rotary Hop-Up (Top Down Center) – very accurate and stable hop adjustment
• Helium™ Flat Hop bucking – helps improve consistency and effective range
• Sealed aluminum nozzle – better air seal and more consistent operation
• ESA™ quick spring change – adjust power quickly without specialized tools
• Light yet reinforced construction – nylon-fiber reinforced polymer keeps the build 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 (such as barrel components and enlarged 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

Package includes

• Airsoft-replica
• S-Mag Hi-Cap magazine
• Cleaning rod
• Allen key
• Small Tamiya to Deans adapter
• Extra spring: M90

Not included

• Battery
• Charger

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