AK SA-J04 EDGE Gen.2 HAL ETU Black

The Specna Arms SA-J04 EDGE Gen.2 is an AK-platform electric airsoft replica combining a predominantly steel construction, genuine wooden handguard and side-folding skeleton metal stock. Its configuration includes the ORION V3 gearbox, programmable HAL ETU electronics and Magnus TDC hop-up chamber, providing modern internal components while retaining the classic AK appearance.

Features and technical specifications

• Manufacturer: Specna Arms
• Model: SA-J04
• Series: EDGE Gen.2
• Manufacturer code: SPE-01-047741
• Platform: AK / J-Series
• Operation: electric AEG
• Power output: below 1 J, Italian-market configuration
• Colour: Black
• Receiver: sheet steel
• Outer barrel: one-piece steel construction
• Handguard: genuine wood
• Stock: side-folding skeleton metal stock
• Gearbox: reinforced ORION V3
• Spring change system: ESA2
• Hop-up: Magnus TDC, Top Down Center adjustment
• Electronics: HAL ETU with magnetic trigger detection
• Side mount: dovetail rail for compatible optic mounts
• Battery connector: T-Deans
• Battery compartment: under the top cover
• Length with stock extended: approximately 950 mm
• Weight: approximately 3,420 g

Package contents

• 2 S-MAG mid-cap magazines
• BB speedloader
• Cleaning rod
• Allen key
• Mini Tamiya-to-T-Deans adapter

Battery and charger are not included.

HAL ETU electronics

The HAL ETU uses Hall-effect magnetic sensors to detect trigger movement, replacing traditional mechanical trigger contacts.

The electronic unit offers several settings that can be programmed directly through the trigger:

• 5 adjustable trigger sensitivity levels
• 6 adjustable pre-cocking levels
• Active braking
• Binary Trigger
• Configurable AUTO modes: full-auto, semi-auto, 3-round and 5-round burst
• Configurable SEMI modes: semi-auto, Binary, AUG and Sniper
• Low battery warning

Gearbox and hop-up system

The ORION V3 gearbox features a piston with steel teeth, double-sealed aluminium cylinder head, sealed aluminium nozzle, polymer piston head and bearing-equipped spring guide.

The ESA2 system simplifies spring replacement, while the Magnus TDC chamber provides centred hop-up pressure adjustment for precise BB trajectory tuning.

Battery and manufacturer's recommendation

The replica is LiPo-ready and accommodates stick-type batteries beneath the top cover.

Specna Arms specifically recommends using a 7.4 V battery when an M90 spring is installed to avoid potential malfunctions.

This recommendation is particularly relevant to Italian-market configurations operating below 1 J. Higher battery voltage may increase the mechanical cycle speed and, under certain conditions, contribute to issues such as premature piston engagement.

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READY TO PLAY package included in the price: each replica is individually inspected, tested and checked before sale.