Specna Arms SA-J81 CORE™ HAL ETU Gen.2 is a modern AK-style electric airsoft gun for players who want a reliable and easily adjustable gun straight out of the box. The J-Series™ CORE Gen.2 combines a lightweight nylon-reinforced polymer body, upgraded internal parts and HAL™ electronics.
The SA-J81 body is made from reinforced polymer, keeping the overall weight moderate and making the gun easy to handle. The steel dust cover, fire selector and trigger guard add durability in high-stress areas. Metal external parts, such as the barrel, sights and handguard mounting parts, further support the overall durability of the construction. The side dovetail rail allows the use of AK-style optic mounts, and the folding stock makes the gun easier to transport and handle in tighter spaces.
Internal Parts and Systems
The SA-J81 CORE Gen.2 features a V3 gearbox with ESA2™ quick spring change, a TDC Magnus™ Rotary Hop-Up chamber and HAL™ ETU system. The overall setup supports consistent BB flight, good adjustability and reliable operation.
- V3 gearbox with ESA2™ quick spring change
- TDC Magnus™ Rotary Hop-Up chamber for precise and stable adjustment
- 6.03 mm precision inner barrel
- 16:1 CNC steel gears
- 8 mm ball bearings
- Sealed aluminum nozzle
- Aluminum cylinder and sealed cylinder head
- Steel-toothed piston
HAL™ System Features
The HAL™ ETU allows the trigger and fire modes to be adjusted directly via the trigger without a separate app.
- Trigger detection with a magnetic sensor
- Adjustable trigger sensitivity, 5 levels
- Binary trigger
- Active brake
- Adjustable piston pre-cocking, 6 levels
- Programmable SEMI modes: semi, binary, AUG and sniper
- Programmable AUTO modes: full-auto, semi-auto, 3-round burst and 5-round burst
- Easy programming via the trigger
- Low battery voltage warning
Construction and External Parts
- Nylon-reinforced polymer body
- Steel dust cover, fire selector and trigger guard
- Metal external parts, such as the barrel, sights and handguard mounting parts
- Side dovetail rail for optic mounts
- Folding stock
- AK-style construction for versatile gameplay
- 14 mm CCW outer barrel thread
- Deans/T-plug connector
ESA2™ Quick Spring Change
The ESA2™ quick spring change system allows the spring to be changed without fully disassembling the gearbox. The factory-installed spring produces a muzzle velocity of approximately 122 m/s with 0.20 g BBs. The included M90 spare spring allows the muzzle velocity to be lowered for lower power limits, for example.
Compatibility and Batteries
The gun has a Deans/T-plug connector, and a Small Tamiya to Deans adapter is included. The battery compartment is located under the dust cover and is suitable for stick-type LiPo or Li-Ion batteries. Battery and charger are not included in the package.
Magazine Compatibility
The gun is compatible with most AK-style magazines. Cyma, JG, E&L and Bolt magazines are generally compatible, but magazines from other manufacturers may require minor fitting.
Package Includes
- Specna Arms SA-J81 CORE™ HAL ETU Gen.2 airsoft carbine
- S-MAG hi-cap magazine
- M90 spare spring
- Cleaning rod
- Small Tamiya to Deans adapter
NOTE!
Battery and charger are not included in the package.
HAL™ Trigger Calibration Before First Use
This airsoft gun is equipped with the HAL™ system, and the trigger must be activated before using the gun. Activation is done as follows:
Setup:
1. Turn the fire selector to the “SAFE” position.
2. Connect the battery to the gun.
3. Wait three (3) seconds until the gun emits a “beep” sound.
4. Pull and hold the trigger for approximately five (5) seconds until the gun emits a “beep” sound. This means that the HAL module activation has been successful.
