M4 Airsoft RRA SA-E25 EDGE HAL 2 ETU V2

Specna Arms RRA SA-E25 EDGE™ HAL²™ ETU Gen. 2 — Airsoft Carbine (Black)

Precision. Durability. Digital Control.
The Specna Arms RRA SA-E25 EDGE™ HAL²™ ETU Gen. 2 combines official Rock River Arms® licensing with Specna Arms’ next-generation HAL²™ electronic trigger unit and ÆTHER™ reinforced gearbox. Compact, robust, and smart — it’s engineered to perform flawlessly in any airsoft environment.

EDGE™ Gen. 2 — advanced internal design

• 6.03 mm precision inner barrel for consistent accuracy
• Metal barrel with Nano Coating to prevent scratches
• Sealed aluminium nozzle for perfect air seal
• Helium™ Flat Hop Eraser for improved BB flight stability
• Rotating MAGNUS™ TDC Hop-Up chamber (Top Down Center)
• ÆTHER™ Gearbox (EU Patent No. 015044865-0001) with:
  • Anti-reversal release window
  • Pre-cocking and AoE inspection ports
  • Reinforced structural stress points
  • Motor pinion access port
  • Trigger alignment and frame alignment screws

HAL²™ — high-precision programmable trigger

The HAL²™ system uses a magnetic Hall effect sensor for up to 500 sensitivity levels, providing ultra-responsive and dirt-resistant performance. It integrates Bluetooth® Low Energy for fast and stable connection with the Specna Link™ mobile app (available for Android and iOS), allowing full customization.

• Adjustable trigger sensitivity and pre-cocking
• Programmable modes: SEMI, AUTO, BURST, BINARY
• Rate of fire and burst length customization
• LiPo/Li-Ion battery protection and monitoring
• Magazine simulation and telemetry data logging
• Multiple profiles for different loadouts
• Real-time performance monitoring

Rock River Arms® licensed design

Produced under official license from Rock River Arms®, this replica faithfully reproduces the design and ergonomics of the AR-15 carbines used by U.S. law enforcement and agencies such as the DEA and FBI.

• Full-metal receiver with RRA® trademarks and serial number
• RRA Lightweight Free Float Rail — M-LOK standard (licensed)
• Folding polymer sights
• Adjustable SF-type stock with non-slip rubber pad
• QD pistol grip for quick, tool-free motor access
• Ambidextrous sling mount points
• 14 mm CCW threaded barrel — suppressor-ready

ESA™ — Quick Spring Change System

The ESA™ (Easy Spring Access) system allows rapid power tuning without gearbox disassembly. Adjust the replica’s FPS to field limits in under a minute — ideal for both CQB and outdoor games. Includes an M90 spring for lower-velocity configurations.

Internal components

• Polymer piston with full steel teeth
• Bearing-mounted polymer spring guide
• Sealed polymer piston head with bearing
• Aluminium cylinder and double-sealed head
• Steel gear set for long-term reliability

Package includes

• Specna Arms RRA SA-E25 EDGE™ HAL²™ ETU Gen. 2 (Black)
• 2 × S-MAG mid-cap magazines (125 rds)
• M90 additional spring
• Vertical forward grip
• Cleaning rod
• Small Tamiya → DEANS adapter
• BB speedloader

Note: Battery and charger not included. Compatible with DEANS / T-Connect LiPo or Li-Ion batteries. Browse compatible options here: /collections/batteries-and-chargers.

Performance & handling

Compact, light, and responsive — the SA-E25 EDGE™ HAL²™ offers up to 380 FPS through a 250 mm precision barrel. Designed for CQB and dynamic field engagements, it provides exceptional maneuverability and control.

Related collections

• /collections/airsoft-rifles
• /collections/specna-arms-airsoft-guns-all
• /collections/rock-river-arms

Technical specifications

Compact. Smart. Ready for action.
The RRA SA-E25 EDGE™ HAL²™ combines authentic RRA design with Specna Arms’ smart HAL²™ technology, making it one of the most capable compact AEGs in its class.

Meta: Specna Arms RRA SA-E25 EDGE HAL² ETU Gen.2 Black — licensed M-LOK airsoft carbine with HAL² Bluetooth trigger, ESA quick spring system & AETHER gearbox.

Tags: Specna Arms, Rock River Arms, SA-E25, EDGE Gen2, HAL2 ETU, M-LOK, ESA system, AETHER gearbox, airsoft rifle, black