[Specna Arms] SA-F04 FLEX™ ETU G2 (Scheduled for release mid-September 2026, Pre-order)

The second release from "SPECNA ARMS" is finally here!!

What is SPECNA ARMS? Features and Series Explained

[FLEX Series]
An entry-level model focused on lightness and mobility, this series features quick aiming and high maneuverability.

The Specna Arms SA-F04-RL FLEX Gen.2 Light Ops Stock/New Receiver HAL ETU Airsoft Carbine is an electric gun that achieves practical equipment and high operating performance at an attractive price point. Equipped with the "HAL ETU" optical sensor-controlled electronic trigger, it provides sharp response and stable operating performance.
Furthermore, it features a rotary TDC Magnus hop-up chamber, 8mm slide bearings + steel gears, and a quick-change spring system. The M-LOK handguard and receiver made of nylon fiber reinforced polymer ensure it is lightweight and easy to handle, offering a well-balanced unit that is ready for a wide range of field uses right out of the box.

■Models Equipped with Specna Arms Advanced Motor
While achieving an accessible price point for an entry-class model, it is equipped with the practical Specna Arms Advanced Motor.
When combined with the "HAL ETU™" electronic trigger, it provides stable operational feel and supports a wide range of field uses.

Redesigned based on accumulated technology and expertise, it delivers stable performance even out of the box. It possesses the practicality to handle a wide range of uses in airsoft fields.

With a design that combines ease of use and reliability, it is a model suitable for a wide range of users, from beginners to experienced players.

[Features]
・FLEX / CORE motor equipped
・Electronic trigger control by HAL ETU
・Nylon fiber reinforced polymer M-LOK handguard
・6.03mm inner barrel
・Rotary TDC Magnus hop-up chamber
・18:1 CNC gears
・8mm slide bearings
・Quick-change spring system equipped
・Full-auto / burst / semi-auto compatible
・T-type connector adopted

■Product Specifications:

・Handguard Type: M-LOK
・Inner Barrel Diameter: 6.03mm
・Inner Barrel Material: Brass
・Inner Barrel Length: 235mm
・Chamber Type: Rotary TDC Magnus™
・Body Size: 670mm～750mm
・Body Weight: 2125g
・Quick Spring Change System Equipped
・Magazine Capacity: 300 rounds
・Handguard Material: Nylon fiber reinforced polymer
・Receiver Material: Nylon fiber reinforced polymer
・Barrel Thread: 14mm Counter-Clockwise
・Internal Specifications: 8mm slide bearings, steel gears (18:1 ratio), polycarbonate polymer piston
・Firing Modes: Full-auto / Adjusted burst / Semi-auto
・Electronic Trigger: HAL equipped
・Connector Type: T-type connector
・Compatible Battery: EVO LiPo battery 7.4V/1200mAh stock pipe-in (T-type connector)
・Motor: Specna Arms Advanced (Brushed motor)
・Gearbox: Gearbox V2

It adopts practical specifications for both internal and external components, including a rotary TDC Magnus™ hop-up chamber, 8mm slide bearings + steel gears, and a quick spring change system.
The M-LOK handguard and receiver, made of nylon fiber reinforced polymer, also ensure lightness and ease of handling. It is a well-balanced unit that can be used for a wide range of field uses right out of the box.

■First Startup Method
1. Set the selector to "Safe".
2. Connect the battery. After connecting, there will be "3" beeps. Approximately 3 seconds later, there will be "1" high-pitched beep.
3. Hold the trigger for about 5 seconds. If there are "2" high-pitched beeps, the setup is complete.

■Equipped with HAL ETU™ Electronic Control System
The trigger adopts "HAL ETU™," which uses an optical sensor for electronic control. It achieves both sharp, excellent response and stable operation feel.

[Main Features of HAL ETU™]
・Full-auto / Semi-auto / Configurable burst firing
・Trigger sensitivity setting
・Pre-cocking setting
・Active brake setting

■Setting Specna Arms Electronic Trigger "HAL"
Quickly switch the selector switch from "AUTO" to "SEMI" twice, and set it to "SEMI" to enter program mode.
In program mode, first select each setting item. If you pull the trigger one by one while the selector switch is still on "SEMI", a beep will sound and you can switch between setting items.

[Setting Items]
1 beep - Full-auto settings
2 beeps - Semi-auto settings
3 beeps - Trigger settings
4 beeps - Pre-cocking settings
5 beeps - Active brake settings

With the desired setting item selected, switch the selector lever to "AUTO" to enter the detailed setting mode for each item.
Hold the trigger down for 3 seconds while the selector lever is in "AUTO" to save the program settings.

[Details of Each Item]
・Full-auto settings
1 beep - Full-auto
2 beeps - Semi-auto
3 beeps - 3-round burst
4 beeps - 5-round burst

・Semi-auto settings
1 beep - Semi-auto only
2 beeps - Binary
3 beeps - AUG mode
4 beeps - Sniper mode

・Trigger settings
1 beep - 20%
2 beeps - 40%
3 beeps - 60%
4 beeps - 80%
5 beeps - 100%

・Pre-cocking settings
1 beep - LEVEL 1
2 beeps - LEVEL 2
3 beeps - LEVEL 3
4 beeps - LEVEL 4
5 beeps - LEVEL 5
6 beeps - LEVEL 6

・Active brake settings
1 beep - ON
2 beeps - OFF

Hold the trigger for 3 seconds while the selector lever is in the "AUTO" position to save and exit the program settings.

・Binary: Pull the trigger for one shot, release for another shot.
・AUG: Pull the trigger lightly for semi-auto, pull deeply for full-auto.
・Sniper: Pull the trigger once, wait for a beep, then pull the trigger again to fire.

*For normal use, please use pre-cocking settings LEVEL 1-3. LEVEL 4-6 are for advanced custom configurations.
*Active brake is "ON" by default. If no customization is done, there is no need to turn it "OFF", so please use it as is.

■Accessories
・1 magazine
・Cleaning rod
・Hex wrench
・Small Tamiya - Deans adapter

■Note:
※Product specifications are subject to change without notice.
※This product is for "ages 18 and over." Individuals under 18 years of age are not permitted to use or purchase it.
※Customers who purchase this product may be asked to present identification by local authorities or police departments. In such cases, please comply with the request and provide your identification.