Specna Arms SA-B05 ONE SAEC Kestrel ETU AEG - Black

The housing of the SA-B05 is mainly made of a zinc-aluminum alloy, screws, pins and belt holder are made of steel. The stock and pistol grip are made of polymer plastic. The AEG utilises a new generation quick-change spring system, known as SAEC™. This allows quick and efficient adjustment of the AEG's performance to the conditions expected on the battlefield, without the need for access to a workshop or a set of special tools. Replacing the spring is now even faster than with the previous version of the system. Thanks to the SAEC™ system, the gearbox no longer needs to be removed from the AEG - simply remove the stock and unscrew the special pin underneath together with the spring guide bearing. The spring is replaced, the pin replaced and the shaft fitted. The entire process only requires a long Phillips screwdriver to unscrew the stock.

The improved version features a number of new, reinforced parts such as:

- reinforced steel gears
- steel spring guide
- lightweight polymer piston
- sealed aluminum piston head
- metal cylinder head
- sealed metal nozzle

Kestrel V2 Basic ETU - This advanced ETU system with MOSFET is characterized by ease of use, durability and functionality. The Kestrel V2 Basic is programmed by pulling the trigger and works with both brushed and brushless motors in high speed and high torque configurations.

Kestrel Basic System Features:

- Preload programmable in 5 levels with piston position learning function
- Function requires a few single shots to calibrate after connecting the battery
- Each shot is a complete cycle, which results in a reduction in the load on the springs and mechanical parts
- Locked rotor protection: Function protects the inside of the gearbox in case of damage to the motor
- Battery discharge protection: The motor vibrates, the blue LED lights up five times to indicate the battery discharge
- Under/over voltage protection. The module detects the number of battery cells and adapts the operation to different cell counts and voltages from 6V to 17V