M4 Airsoft SA-E21 EDGE HAL 2 ETU V2
Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 — Airsoft Carbine (black)
Compact precision meets smart control. The Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 in black is a modern, digitally enhanced airsoft carbine designed for demanding players. Featuring the HAL²™ Bluetooth® electronic trigger system, the patented ÆTHER™ reinforced gearbox, and the ESA™ Quick Spring Change System, this carbine delivers high responsiveness, reliability, and field-ready performance straight out of the box.
Enhanced EDGE™ Gen. 2 platform
- 6.03 mm precision inner barrel for improved accuracy and range
- Metal outer barrel with Nano Coating for scratch resistance
- Helium™ Flat Hop Eraser for consistent BB flight
- Rotating MAGNUS™ TDC Hop-Up chamber (Top-Down Center design)
- Sealed aluminium nozzle for tight air seal
-
ÆTHER™ Gearbox shell (EU Patent no. 015044865-0001) featuring:
- Anti-reversal release window
- Pre-cocking & AoE inspection ports
- Reinforced high-stress points
- Motor pinion inspection access
- Trigger adjustment and alignment screws
HAL²™ — Smart Bluetooth® Electronic Trigger Unit
The HAL²™ system is based on the magnetic Hall effect, offering up to 500 sensitivity levels for the trigger. This allows ultra-fast, precise trigger response and high durability, with resistance to dirt and external light. The integrated Bluetooth® Low Energy module connects to your smartphone via the Specna Link™ app (Android / iOS), enabling full configuration and telemetry.
- Trigger sensitivity and pre-cocking adjustment
- Selectable fire modes: SEMI, BINARY, BURST, AUTO
- Adjustable burst length and rate of fire
- Battery voltage monitoring and LiPo/Li-Ion protection
- Magazine simulation mode and battery status display
- Real-time replica status tracking and telemetry
- Save multiple game mode profiles
Rugged Black design
This variant features a striking black anodized finish for a unique look. The metal body includes authentic Specna Arms markings and an individual serial number. Its M-LOK handguard allows easy mounting of accessories such as flashlights, lasers, and grips, while the compact design ensures agility in both CQB and open-field use.
- Full metal receiver and handguard construction
- M-LOK mounting system + RIS top rail with folding sights
- Adjustable polymer stock with sling mount points
- QD pistol grip for tool-less motor access
- Ambidextrous sling attachment eyelets
- 14 mm CCW threaded outer barrel (for silencers/tracers)
ESA™ Quick Spring Change System
The ESA™ system allows rapid adjustment of replica power without gearbox disassembly. Simply remove the stock tube to access the spring guide and switch between field or CQB limits. The included M90 spring provides flexibility for different airsoft environments.
Internal configuration
- Polymer piston with full steel teeth
- Bearing-mounted polymer spring guide
- Sealed polymer piston head with bearing
- Aluminium cylinder & double sealed cylinder head
- Set of steel gears on 8 mm bearings
What’s included
- Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 replica (black)
- 2 × S-MAG mid-cap magazines (125 rounds each)
- M90 additional spring
- Vertical foregrip
- 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 products at /collections/batteries-and-chargers.
For tactical agility and digital precision
Combining compact dimensions, a 210 mm precision barrel, and the advanced HAL² ETU system, the SA-E21 EDGE™ HAL² is perfect for fast-paced CQB or dynamic field play. Built for professionals who demand control, speed, and reliability in a lightweight platform.
Related collections
- /collections/airsoft-rifles
- /collections/specna-arms-airsoft-guns-all
Technical specifications
| Specification | Value |
| Model | Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 |
| Power supply | Electric (LiPo / Li-Ion) — DEANS / T-Connect |
| Colour | black |
| Gearbox | Version 2 — ÆTHER™ reinforced shell |
| Inner barrel | 6.03 mm / 210 mm |
| Muzzle velocity | ~380 FPS |
| Fire modes | Semi, Full-auto, Burst (adjustable), Binary (via HAL²) |
| Quick Spring Change | ESA™ system |
| Magazine capacity | 125 rounds (mid-cap) |
| Included magazines | 2 × S-MAG mid-cap |
| Thread | 14mm CCW |
| Bearings | 8 mm |
| Length | 710 mm |
| Weight | ~2260 g |
| Body material | Metal receiver; polymer stock, sights & grip |
| Markings | Specna Arms licensed engravings & serial number |
Compact, digital, and battle-proven. The Specna Arms SA-E21 EDGE™ HAL² Gen. 2 offers cutting-edge electronics, fast response, and modern aesthetics — the ultimate upgrade for CQB and field players alike.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 — Airsoft Carbine (black)
Compact precision meets smart control. The Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 in black is a modern, digitally enhanced airsoft carbine designed for demanding players. Featuring the HAL²™ Bluetooth® electronic trigger system, the patented ÆTHER™ reinforced gearbox, and the ESA™ Quick Spring Change System, this carbine delivers high responsiveness, reliability, and field-ready performance straight out of the box.
Enhanced EDGE™ Gen. 2 platform
- 6.03 mm precision inner barrel for improved accuracy and range
- Metal outer barrel with Nano Coating for scratch resistance
- Helium™ Flat Hop Eraser for consistent BB flight
- Rotating MAGNUS™ TDC Hop-Up chamber (Top-Down Center design)
- Sealed aluminium nozzle for tight air seal
-
ÆTHER™ Gearbox shell (EU Patent no. 015044865-0001) featuring:
- Anti-reversal release window
- Pre-cocking & AoE inspection ports
- Reinforced high-stress points
- Motor pinion inspection access
- Trigger adjustment and alignment screws
HAL²™ — Smart Bluetooth® Electronic Trigger Unit
The HAL²™ system is based on the magnetic Hall effect, offering up to 500 sensitivity levels for the trigger. This allows ultra-fast, precise trigger response and high durability, with resistance to dirt and external light. The integrated Bluetooth® Low Energy module connects to your smartphone via the Specna Link™ app (Android / iOS), enabling full configuration and telemetry.
- Trigger sensitivity and pre-cocking adjustment
- Selectable fire modes: SEMI, BINARY, BURST, AUTO
- Adjustable burst length and rate of fire
- Battery voltage monitoring and LiPo/Li-Ion protection
- Magazine simulation mode and battery status display
- Real-time replica status tracking and telemetry
- Save multiple game mode profiles
Rugged Black design
This variant features a striking black anodized finish for a unique look. The metal body includes authentic Specna Arms markings and an individual serial number. Its M-LOK handguard allows easy mounting of accessories such as flashlights, lasers, and grips, while the compact design ensures agility in both CQB and open-field use.
- Full metal receiver and handguard construction
- M-LOK mounting system + RIS top rail with folding sights
- Adjustable polymer stock with sling mount points
- QD pistol grip for tool-less motor access
- Ambidextrous sling attachment eyelets
- 14 mm CCW threaded outer barrel (for silencers/tracers)
ESA™ Quick Spring Change System
The ESA™ system allows rapid adjustment of replica power without gearbox disassembly. Simply remove the stock tube to access the spring guide and switch between field or CQB limits. The included M90 spring provides flexibility for different airsoft environments.
Internal configuration
- Polymer piston with full steel teeth
- Bearing-mounted polymer spring guide
- Sealed polymer piston head with bearing
- Aluminium cylinder & double sealed cylinder head
- Set of steel gears on 8 mm bearings
What’s included
- Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 replica (black)
- 2 × S-MAG mid-cap magazines (125 rounds each)
- M90 additional spring
- Vertical foregrip
- 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 products at /collections/batteries-and-chargers.
For tactical agility and digital precision
Combining compact dimensions, a 210 mm precision barrel, and the advanced HAL² ETU system, the SA-E21 EDGE™ HAL² is perfect for fast-paced CQB or dynamic field play. Built for professionals who demand control, speed, and reliability in a lightweight platform.
Related collections
- /collections/airsoft-rifles
- /collections/specna-arms-airsoft-guns-all
Technical specifications
| Specification | Value |
| Model | Specna Arms SA-E21 EDGE™ HAL² ETU Gen. 2 |
| Power supply | Electric (LiPo / Li-Ion) — DEANS / T-Connect |
| Colour | black |
| Gearbox | Version 2 — ÆTHER™ reinforced shell |
| Inner barrel | 6.03 mm / 210 mm |
| Muzzle velocity | ~380 FPS |
| Fire modes | Semi, Full-auto, Burst (adjustable), Binary (via HAL²) |
| Quick Spring Change | ESA™ system |
| Magazine capacity | 125 rounds (mid-cap) |
| Included magazines | 2 × S-MAG mid-cap |
| Thread | 14mm CCW |
| Bearings | 8 mm |
| Length | 710 mm |
| Weight | ~2260 g |
| Body material | Metal receiver; polymer stock, sights & grip |
| Markings | Specna Arms licensed engravings & serial number |
Compact, digital, and battle-proven. The Specna Arms SA-E21 EDGE™ HAL² Gen. 2 offers cutting-edge electronics, fast response, and modern aesthetics — the ultimate upgrade for CQB and field players alike.
