Specna Arms SA-J79 CORE™ HAL ETU Gen.2

Specna Arms SA-J79 CORE™ HAL ETU Gen.2 - Black

The Specna Arms SA-J79 CORE™ HAL ETU Gen.2 is a full-length AK-style AEG combining a lightweight reinforced polymer construction with programmable HAL™ electronics, upgraded CORE™ Gen.2 internals and a long 455 mm precision inner barrel.

The SA-J79 belongs to the redesigned Specna Arms J-Series™ CORE™ Gen.2 range. The series offers modern internal components and practical adjustment options in an accessible factory configuration suitable for both newer and more experienced airsoft players.

Its traditional fixed-stock AK configuration and 1,025 mm overall length give the rifle a classic appearance and stable handling. The long barrel assembly makes the SA-J79 particularly suitable for outdoor games and players who prefer a full-length AK platform.

Programmable HAL™ ETU

The HAL™ electronic trigger unit detects trigger movement using magnetic Hall-effect sensors instead of a conventional mechanical trigger switch. Its firing and response settings can be programmed directly through the trigger without opening the rifle or using a separate application.

• Adjustable trigger sensitivity: five levels from 20 to 100%
• Adjustable pre-cocking: six levels
• Active Brake
• Binary trigger mode
• Programmable AUTO selector modes: full auto, semi-automatic, three-round burst or five-round burst
• Programmable SEMI selector modes: semi-automatic, binary, AUG or sniper mode
• Easy programming through the trigger
• Low-battery warning

In the HAL™ AUG mode, the rifle fires an initial three-round burst and continues in full auto if the trigger remains pressed.

Updated CORE™ Gen.2 internals

The internal mechanism is built around a Version 3 gearbox with 8 mm bearings and 16:1 steel gears. The compression system includes an aluminium cylinder, sealed polymer piston and cylinder heads, a sealed aluminium nozzle and a piston with a 14.5-tooth steel rack.

• Version 3 gearbox
• 8 mm bearings
• 16:1 steel gears
• Piston with a 14.5-tooth steel rack
• Sealed polymer piston head
• Sealed polymer cylinder head
• Aluminium cylinder
• Sealed aluminium nozzle
• 6.03 mm brass precision inner barrel

Magnus™ TDC hop-up chamber

The rotary Magnus™ TDC hop-up chamber applies pressure directly from above, allowing precise and stable adjustment. It is paired with a 455 mm long, 6.03 mm brass inner barrel to support a consistent BB trajectory in the factory configuration.

Quick-change spring system

The quick-change spring system allows the mainspring to be replaced without completely disassembling the gearbox. This makes it easier to adapt the muzzle velocity to different field limits and styles of play.

The advertised muzzle velocity of the standard configuration is approximately 116 m/s or 380 FPS. An additional M90 spring is included for reducing the output when required.

Lightweight AK-style construction

The receiver and several external components are made from durable nylon-fibre-reinforced polymer. Selected structural parts, including components of the barrel assembly, sight blocks, handguard retainers and muzzle device, are made from aluminium and zinc alloy.

The top cover, fire selector and trigger guard are made from steel. The receiver also features an AK-style dovetail side rail for installing a compatible optic mount.

The battery compartment is located underneath the top cover and provides space for a stick-type battery. The rifle is LiPo-ready and uses a DEANS / T-connect battery connector. A Small Tamiya to DEANS adapter is included.

Magazine compatibility

The rifle is compatible with many AK-style magazines. Magazines from Cyma, JG, E&L and Bolt generally fit without modification, while magazines from other manufacturers may require minor fitting.

Features

• Full-length AK-style J-Series™ CORE™ Gen.2 construction
• Programmable HAL™ electronic trigger unit
• Magnetic Hall-effect trigger detection
• Adjustable trigger sensitivity and pre-cocking
• Active Brake and binary trigger functions
• Programmable semi-automatic, full-auto and burst modes
• Version 3 gearbox
• 8 mm bearings and 16:1 steel gears
• Magnus™ rotary TDC hop-up chamber
• 455 mm long, 6.03 mm brass precision inner barrel
• Sealed aluminium nozzle
• Quick-change spring system
• Nylon-fibre-reinforced polymer receiver
• Steel top cover, fire selector and trigger guard
• AK-style dovetail side rail
• DEANS / T-connect battery connector

Technical specifications

• Manufacturer: Specna Arms
• Model: SA-J79 CORE™ HAL ETU Gen.2
• Product type: electric airsoft rifle
• Operating system: AEG
• Gearbox: Version 3
• Electronic trigger unit: HAL™ ETU
• Fire modes: semi-automatic, full auto and programmable burst modes
• Muzzle velocity: approximately 116 m/s / 380 FPS
• Hop-up: adjustable Magnus™ TDC rotary chamber
• Inner barrel diameter: 6.03 mm
• Inner barrel material: brass
• Inner barrel length: 455 mm
• Gear ratio: 16:1
• Bearing diameter: 8 mm
• Magazine type: S-MAG mid-cap
• Overall length: approximately 1,025 mm
• Weight: approximately 2,625 g
• Battery connector: DEANS / T-connect
• Battery compartment: underneath the top cover
• Recommended battery shape: stick-type
• Main materials: nylon-fibre-reinforced polymer, aluminium, zinc alloy and steel
• Colour: Black

Package contents

• Specna Arms SA-J79 CORE™ HAL ETU Gen.2 AEG
• 2 × S-MAG mid-cap magazine
• Additional M90 spring
• Small Tamiya to DEANS adapter
• Cleaning rod

Activating the HAL™ trigger before first use

The HAL™ trigger must be activated when the battery is connected for the first time:

1. Set the fire selector to SAFE.
2. Connect the battery to the rifle.
3. Wait approximately three seconds until the system emits a beep.
4. Press and hold the trigger fully for approximately five seconds.
5. Release the trigger after the confirmation beep.

Note: The battery and charger are not included.