Specna Arms SA-F04-RL FLEX Gen.2 BLDC HAL ETU Light Ops Stock / New Receiver Electric Airsoft Rifle - Pink
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The Specna Arms SA-F04-RL FLEX™ Gen.2 BLDC™ HAL ETU™ is a next-generation electric airsoft rifle (AEG), designed for players who demand outstanding performance, reliability, and cutting-edge technology right out of the box.
Equipped with a BLDC™ brushless motor, HAL™ ETU™ electronic trigger unit, Light Ops telescopic stock, and a New Receiver, this replica delivers instant trigger response, outstanding energy efficiency, and a significantly longer service life compared to traditional brushed motors.
BLDC™ Brushless Motor – Superior Performance
The BLDC™ (Brushless Direct Current) motor is a brushless DC motor that eliminates traditional carbon brushes responsible for current transmission.
BLDC™ Motor Benefits
- Spark-free operation;
- Extended service life (no wearable brush components);
- Stable performance even at high RPM;
- High energy efficiency;
- Quiet operation;
- Reduced heat generation;
- Instant trigger response;
- High torque from startup;
- Supports powerful springs without any loss of performance or rotational speed.
FLEX™ Gen.2 – Enhanced Performance
The Specna Arms FLEX™ Gen.2 carbines have been developed to deliver outstanding performance at an attractive price. Drawing on years of experience, innovation, and continuous development, this new generation has been redesigned to provide even better performance, allowing players to take the replica straight out of the box and onto the airsoft field.
To achieve this level of performance, the FLEX™ Gen.2 series is equipped with:
- TDC Magnus™ (Top Down Center) rotary Hop-Up chamber for extremely precise and stable adjustment (European Patent No. 015052069-0001);
- Helium™ Flat Hop-Up bucking, improving BB trajectory stability;
- Sealed aluminum nozzle;
- Reinforced Ather™ gearbox (European Patent No. 015044865-0001) featuring:
- Main spring release system;
- Inspection windows for checking the Pre-Cocking function and Angle of Engagement (AoE);
- Reinforced front section;
- Inspection windows for easier servicing;
- Adjustable trigger travel;
- Gearbox alignment screw holes;
- Compatible with springs up to M140.
HAL™ ETU™ Electronic Trigger Unit
The replica features the advanced HAL™ ETU™ electronic trigger unit, utilizing Hall-effect magnetic sensors for highly accurate trigger detection.
Main Features
- Hall-effect magnetic trigger detection;
- Active Brake;
- Binary Trigger;
- Adjustable trigger sensitivity (5 levels from 20% to 100%);
- Adjustable Pre-Cocking (6 levels);
- Programmable AUTO firing modes:
- Full Auto;
- Semi-Auto;
- 3-round burst;
- 5-round burst;
- Programmable SEMI firing modes:
- Semi-Auto;
- Binary;
- AUG;
- Sniper;
- Quick programming directly via the trigger;
- Low battery warning;
- Fully compatible with brushless motors.
Note: In AUTO mode, the first trigger pull fires a 3-round burst, after which the replica continues in Full Auto mode.
Durable Construction and Premium Materials
The replica is primarily manufactured from glass fiber-reinforced nylon polymer combined with metal components. The polymer offers excellent strength, a slightly textured surface, and a matte finish.
The most heavily stressed components are made of metal, including:
- Flash hider;
- Outer barrel;
- Dummy bolt;
- Ejection port cover;
- Fire selector;
- Bolt catch;
- Magazine release;
- QD sling attachment points on the stock;
- Body pins;
- Charging handle.
The Specna Arms proprietary New Receiver combines a modern appearance with excellent ergonomics. Every component is precisely manufactured and assembled with great attention to detail.
The model features enlarged ambidextrous controls, including the fire selector and magazine release, as well as a fully functional bolt catch.
Light Ops Telescopic Stock
The Light Ops stock features a modern, minimalist design and lightweight construction.
Features include:
- Non-slip rubber inserts on both sides of the cheek rest;
- Curved rubber butt pad for improved shoulder comfort;
- Lightweight and ergonomic construction.
Internal Components
In addition to the TDC Magnus™ Hop-Up chamber, Ather™ gearbox shell, Helium™ Flat Hop-Up bucking, and sealed aluminum nozzle, the replica also includes:
- 8 mm bearings;
- Steel gears;
- Polycarbonate piston with a full steel rack;
- 6.03 mm precision inner barrel;
- High-performance Specna Arms Dark Matter™ High Speed 27K brushless motor.
ESA™ Quick Spring Change System
The replica utilizes the ESA™ Quick Spring Change System, allowing the main spring to be replaced quickly without fully disassembling the gearbox or using specialized tools. This enables rapid adjustment of the replica's power output to meet the requirements of different airsoft fields.
Replica Features
- Lightweight and compact construction;
- Fully functional bolt catch;
- Ambidextrous controls;
- HAL™ ETU™ electronic trigger unit;
- Light Ops telescopic stock;
- Ergonomic pistol grip;
- M-LOK compatible handguard;
- ESA™ Quick Spring Change System;
- Folding sights;
- High-performance Specna Arms Dark Matter™ High Speed 27K brushless motor.
Package Includes
- Specna Arms SA-F04-RL FLEX™ Gen.2 electric airsoft rifle;
- 2 × S-MAG Mid-Cap magazines;
- Additional M90 spring;
- Small Tamiya to Deans adapter;
- BB speedloader;
- Cleaning rod;
- Allen key.
Package Does Not Include
- Battery;
- Battery charger.
Important Notice
Before using the replica for the first time, immediately after connecting the battery, place the fire selector in the SAFE position and hold the trigger for approximately 5 seconds to activate the HAL™ ETU™ module.


