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Specna Arms SA-C21 CORE HAL ETU Gen.2 AEG Assault Carbine - Olive

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€229.13
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€229.13

Specna Arms SA-C21 CORE HAL ETU Gen.2 AEG Assault Carbine - Olive

The electric replica of the SA-C21 assault carbine from the CORE Gen. 2 series is constructed from reinforced nylon fiber polymer and metal components. Outfitted with a HAL ETU control module, the replica offers fully customizable settings tailored to individual user preferences, along with the ESA quick spring change system. At the heart of the replica lies the durable Aether gearbox. All structural elements are assembled with outstanding precision, ensuring excellent craftsmanship and reliable, smooth operation of the mechanisms.

reinforced body with nylon fiber

Constructed from nylon fiber reinforced polymer, the body, stock extension, and pistol grip offer durability and strength. Metal parts include the outer barrel, handguard, flash hider, enlarged charging handle, and tactical sling mounts, ensuring robust performance. Screws, pins, the ejection port cover, and the dummy bolt are manufactured from steel for added reliability. Manufacturer's markings and a unique serial number are prominently displayed on the body surface.

RIS rail set, retractable stock with non-slip butt plate

22 mm RIS top rail provides compatibility for mounting any optoelectronic accessory. Outfitted with factory-installed, adjustable flip-up sights including a front sight and a peep sight. The handguard features two RIS rails on each side, enabling the attachment of additional tactical gear. The SF type retractable stock is finished with a non-slip butt plate, ensuring the replica can be tailored to suit individual user preferences.

Precision barrel, rotary Hop-Up chamber

Equipped with a rotary Hop-Up TDC Magnus chamber and a 6.03 mm inner diameter precision barrel, the model delivers enhanced range and accuracy on the field. The Helium Flat Hop rubber provides superior spin stability for BBs during firing. A standard flash hider, fixed on a 14 mm counterclockwise thread, enables easy attachment of a sound suppressor as an alternative.

Reinforced Aether gearbox

At the heart of the replica lies the Aether gearbox with a reinforced structure, delivering BB velocities of up to 390 FPS. Equipped with the following features:

  • main spring release system
  • inspection ports designed for pre-cocking and AoE verification
  • strengthened front section
  • additional access points to facilitate shimming
  • integrated trigger adjustment function
  • mounting slots ensuring skeleton alignment
  • engineered for compatibility with M140 springs

HAL ETU Module

The replica features a HAL ETU trigger control system, significantly boosting its performance and enabling straightforward programming of various functions via the trigger and selector. The HAL system provides multiple options for effortless personalisation to match the operator’s requirements and ensures shooting security, including:

  • trigger detection utilizing magnetic sensors and the Hall effect
  • active braking system
  • binary trigger capability
  • adjustable trigger sensitivity with 5 settings ranging from 20% to 100%
  • pre-cocking adjustment across 6 selectable levels
  • programmable Auto fire modes, including Full Auto, Semi, 3-round Burst, and 5-round Burst
  • programmable Semi fire modes, offering Semi, Binary, AUG, and Sniper modes
  • simple programming directly through the trigger
  • low battery warning indicator
  • support for brushless motors

ESA Quick Spring Change System

Featuring an ESA quick spring change system, the carbine enables rapid power adjustments to suit various gameplay scenarios without requiring gearbox disassembly or any specialized tools. Outfitted with a factory M120 main spring, the replica achieves a muzzle velocity of 390 FPS. Included in the set is an additional M90 spring, ensuring the model is well-suited for indoor skirmishes as well.

two Mid-Cap magazines

Included in the set are two Mid-Cap S-MAG magazines, each holding a capacity of 125 BBs.

Set elements

  • Specna Arms SA-C21 CORE HAL ETU Gen.2 AEG Assault Carbine - Olive
  • Includes 2 x S-MAG Mid-Cap magazines
  • Equipped with a cleaning rod
  • Comes with a hex key
  • Supplied with a small Tamiya to T-Deans adapter
  • Includes a BB speedloader
  • Comes with an additional M90 spring

Main features

  • Robust build quality
  • Aether v2 gearbox
  • Rotary Hop-Up Magnus TDC chamber
  • HAL ETU module
  • 14 mm CCW threading
  • Precision sighting systems
  • Adjustable retractable stock
  • Helium Flat Hop bucking
  • ESA rapid spring exchange system
Specna Arms


Militaria.pl is a premium dealer of Specna Arms.


Specna Arms is a brand specialized in the production of ASG replicas, valued for their solid workmanship and value for money. The offered models are characterized by realistic appearance and high durability. The range includes a variety of series - from lightweight CORE™ models for beginners, through advanced EDGE™ models with metal bodies and licensed markings, to top PRIME™ replicas with brushless motors and modern electronics. The brand collaborates with renowned companies such as Rock River Arms and Daniel Defense. Specna Arms has a reputation among both beginners and advanced airsoft players.

More Information
Based on M4
Replica propulsion Electric
Muzzle velocity 390 fps
Accurate shot range Up to 40 m
Magazine type Mid-Cap
Magazine capacity 125 6 mm caliber BBs
Gearbox Reinforced
Body Plastic
Overall length 720 mm
Weight 2140 g
Main color Olive
Optics ready Yes
Fixed sighting devices Yes
Blowback No
Additional accessories included Yes
Accessory rail Yes
Hop-up Yes, adjustable
Plug type Deans/T-Connect
EAN 5902543212467
Manufacturer code SPE-01-048069
Brand Specna Arms

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