Description
Specna Arms SA-F04-RL FLEX™ BLDC™ Light Ops Stock / HAL ETU™ Gen. 2 - Olive
A lightweight and technologically advanced AEG featuring a Dark Matter 27K brushless motor, programmable HAL™ ETU electronics, reinforced Aether™ gearbox and adjustable Magnus™ TDC hop-up.
The Specna Arms SA-F04-RL FLEX™ BLDC™ HAL ETU™ Gen. 2 is designed for players who want a light and easy-to-handle electric airsoft rifle without sacrificing performance or modern electronic features. The factory-installed brushless motor and programmable HAL™ ETU provide fast trigger response, smooth operation and versatile fire-mode programming without requiring immediate aftermarket upgrades.
The olive nylon-reinforced polymer receiver and handguard keep the overall weight low, while metal load-bearing components provide rigidity in essential areas. The compact Light Ops stock and approximately 650–750 mm adjustable overall length make the rifle well suited to both indoor environments and outdoor games.
Dark Matter 27K brushless motor
The Specna Arms Dark Matter 27K brushless motor delivers efficient operation, fast response and smooth cycling. Compared with a conventional brushed motor, the brushless design reduces mechanical wear and energy loss while supporting consistent performance.
The rifle uses a Deans / T-connector for efficient power transfer. An adapter for Mini-Tamiya batteries is also included, although a battery with a direct Deans connection is recommended.
HAL™ ETU Gen. 2
The factory-installed HAL™ ETU uses Hall-effect magnetic sensors to detect trigger movement without conventional mechanical trigger contacts. The system can be programmed directly through the trigger and offers extensive control over trigger sensitivity, pre-cocking and fire modes.
Programmable functions include active braking, binary trigger, five trigger-sensitivity levels, six pre-cocking levels and several selectable configurations for both the SEMI and AUTO selector positions.
HAL™ ETU functions
- Hall-effect magnetic trigger detection
- Active braking
- Binary trigger function
- Adjustable trigger sensitivity: 5 levels from 20% to 100%
- Adjustable pre-cocking: 6 levels
- AUTO-position programming: full auto, semi-auto, 3-round burst or 5-round burst
- SEMI-position programming: semi-auto, binary, AUG mode or sniper mode
- Trigger-based programming
- Low-battery warning
Aether™ reinforced gearbox
The reinforced Aether™ Version 2 gearbox is designed for durability, maintenance and modern electronic operation. Its shell includes inspection openings for pre-cocking and angle-of-engagement checks, as well as a spring-release function and an adjustable trigger-travel system.
The internal components include steel gears, a polycarbonate piston with steel teeth, a sealed aluminium nozzle and a steel cut-off lever. The gearbox uses a combination of 8 mm J-Cage ball bearings and 8 mm bushings in selected positions.
Aether™ gearbox components
- Reinforced Version 2 gearbox shell
- Spring-release function
- Pre-cocking and AoE inspection openings
- Adjustable trigger travel
- Sealed aluminium nozzle
- Steel gears
- Polycarbonate piston with steel teeth
- Steel cut-off lever
- 8 mm J-Cage ball bearings and bushings
- Factory-installed HAL™ ETU module
- Gearbox shell protected by European design registration 015044865-0001
Magnus™ TDC hop-up and Helium™ Flat Hop
The rotary-style Magnus™ TDC hop-up chamber applies pressure vertically and evenly to the hop-up rubber, helping produce a stable and repeatable backspin. The chamber is protected by European design registration 015052069-0001.
A Helium™ Flat Hop rubber is installed to provide effective hop even with heavier BBs. Together, the chamber and rubber offer a strong foundation for consistent range and accuracy.
ESA™ quick spring change
The ESA™ quick spring-change system allows the rifle’s power output to be adapted by replacing the main spring with only a few tools. An M90 spring and an M120 spring are included, with the M120 installed at the factory.
The listed performance is approximately 95 m/s and 0.90 J with the lower-power spring, or approximately 125 m/s and 1.6 J with the higher-power spring, measured using a 0.20 g BB. Actual output can vary between individual rifles and should always be checked with a chronograph after changing the spring.
Features
- Lightweight FLEX™ Gen. 2 construction
- Olive nylon-reinforced polymer receiver and handguard
- Compact adjustable Light Ops stock
- Specna Arms Dark Matter 27K brushless motor
- Programmable HAL™ ETU Gen. 2
- Reinforced Aether™ Version 2 gearbox
- Magnus™ TDC rotary hop-up chamber
- Helium™ Flat Hop rubber
- ESA™ quick spring-change system
- 14 mm CCW muzzle thread
- Compatible with common tracer units, suppressor replicas and muzzle devices
- Deans / T-connector
- Two S-MAG mid-cap magazines included
- No blowback system
Technical specifications
- Manufacturer: Specna Arms
- Model: SA-F04-RL FLEX™ BLDC™ HAL ETU™ Gen. 2
- Colour: olive
- Product type: electric airsoft rifle / AEG
- Calibre: 6 mm airsoft BB
- Power source: electric
- Receiver and handguard material: nylon-reinforced polymer
- Gearbox: reinforced Aether™ Version 2
- Electronic trigger unit: HAL™ ETU Gen. 2
- Motor: Specna Arms Dark Matter 27K brushless, long type
- Muzzle velocity: approximately 95 m/s or 125 m/s with a 0.20 g BB
- Muzzle energy: approximately 0.90 J or 1.6 J
- Hop-up: adjustable Magnus™ TDC
- Hop-up rubber: Helium™ Flat Hop
- Inner barrel length: 229 mm
- Overall length: approximately 650–750 mm
- Weight: approximately 2125 g
- Fire modes: programmable
- Blowback: no
- Muzzle thread: 14 mm CCW
- Battery connector: Deans / T-connector
- Recommended battery: compatible 7.4 V Deans battery
Package contents
- Specna Arms SA-F04-RL FLEX™ BLDC™ HAL ETU™ Gen. 2 AEG
- 2 x S-MAG 120-round mid-cap magazines
- BB speedloader
- Cleaning rod
- M90 spring
- M120 spring, factory installed
- Mini-Tamiya battery adapter
HAL™ trigger calibration before first use
- Set the fire selector to SAFE.
- Connect the battery.
- Wait approximately three seconds until the rifle emits a beep.
- Hold the trigger fully pressed for approximately five seconds until another beep is heard.
The second beep confirms that the trigger calibration has been completed successfully.
Manual:
HAL manual EN / PL
Note: Battery and charger are not included. A compatible battery with a Deans / T-connector and a suitable balance charger must be purchased separately.
