Specna Arms SA-C21 CORE HAL ETU Gen.2 is a modern AEG carbine built for dependable performance on any field. It combines a lightweight polymer exterior with smart internals and an electronic trigger unit to deliver consistent shots and intuitive control.
Designed from the ground up for practical gameplay, the CORE Gen.2 upgrades focus on shot consistency, trigger feel, and ease of maintenance. The TDC Magnus rotating hop-up and Helium flat hop work together to stabilize flight and make fine adjustments straightforward, even when conditions change. Inside, the reinforced Ather gearbox brings durability and service access features that make tuning and upkeep simpler, including a quick spring release that helps you adapt site limits without a full teardown. The HAL electronic system adds precise trigger detection, an active brake, and flexible programming, so you can tailor fire modes and trigger response to your role—whether you run semi-focused woodland games or need controlled bursts in CQB. Programming is done via the trigger, so no external units are required.
The carbine’s rigid fit between upper and lower receivers gives a solid feel with minimal play, and the enlarged stock houses the battery neatly while keeping balance comfortable for long days. A full-length top rail supports optics and accessories, and the adjustable stock and textured buttplate help dial in a stable shoulder weld. The standard CCW-threaded muzzle allows easy use of common flash hiders, tracers, or suppressor-style covers. For best results, use quality BBs.
If you use the HAL system for the first time, activate it by holding the trigger in SAFE shortly after connecting the battery. The set does not include a battery or charger.
Features
- TDC Magnus rotating hop-up for stable, precise adjustment
- Helium flat hop for consistent BB flight and improved accuracy
- Reinforced Ather gearbox with user-friendly service features
- HAL ETU with adjustable trigger sensitivity and pre-cocking
- Programmable fire modes including semi, full auto, burst, binary, AUG, and sniper
- Lightweight, tight-fitting receiver set for solid handling
In the package
- Specna Arms SA-C21 CORE HAL ETU Gen.2 carbine
- 2 x mid-cap S-MAG magazine
- BB speedloader
- M90 additional spring
- Cleaning rod
- Allen key
- Small Tamiya to Deans adapter
