SA-J81 CORE™ HAL ETU Gen. 2 - Black

The Specna Arms SA-J81 CORE™ HAL ETU Gen. 2 is a modern airsoft carbine designed for players seeking a reliable, lightweight, and highly customizable replica at a reasonable price. As part of the CORE™ Gen. 2 line, it combines upgraded internals, durable materials, and a powerful programmable electronic system.

The replica's body is made of tough nylon fiber-reinforced polymer, which keeps the weight low without sacrificing durability. Key external components like the barrel, sights, and muzzle are crafted from zinc and aluminum alloy, while steel parts reinforce the safety selector and trigger guard. The result is a well-balanced replica that’s both comfortable and robust.

Internally, the J81 comes equipped with:

• A 6.03 mm precision brass barrel for increased accuracy,

• 16:1 steel gear set and a full-steel piston with 14.5 teeth,

• Sealed polymer piston and cylinder heads,

• Sealed aluminum nozzle,

• Aluminum cylinder,

• TDC Magnus rotary Hop-Up chamber,

• And the advanced HAL™ ETU system.

The HAL™ Electronic Trigger Unit offers:

• Magnetic trigger sensors with Hall effect detection,

• Active brake,

• Binary firing mode,

• Adjustable trigger sensitivity (5 levels),

• Adjustable pre-cocking (6 levels),

• Programmable fire modes (semi, binary, AUG, sniper / full-auto, 3-round, 5-round bursts),

• Easy in-trigger programming,

• Low battery warning.

The quick-change spring system (ESA™) allows you to adapt muzzle velocity quickly without opening the gearbox — ideal for field limits and CQB environments.

Replica Features:

• Lightweight polymer body

• Side-mounted "dovetail" optics rail

• LiPo-ready with space for stick-type battery under the top cover

• Mid-cap S-MAG magazine with 430 BB capacity

• Compatible with most AK magazines from Cyma, JG, E&L, and Bolt

Included in the package:

• SA-J81 replica

• 2 S-MAG Hi-Cap magazines (430 BBs)

• Cleaning rod

• Tamiya to Deans adapter

• Spare M90 spring

Not included:
Battery and charger

NOTE!!!
When starting the replica for the first time, you must activate the HAL™ control unit.
Immediately after connecting the battery, hold the trigger in SAFE mode for approximately 5 seconds until you hear a long beep.
This calibrates the unit and prepares the replica for use. Without this step, the replica may not function properly.

↓ETU unit settings↓