The interior of the replica consists of the ETU Kestrel system and a number of reinforced internal parts enclosed in the V2 Long gearbox, providing a solid base for power tuning.

Eshooter's Kestrel™ V2 Basic ETUmodule is an advanced ETU system characterised by ease of use, durability and functionality. The Kestrel™ V2 Basic is programmable with trigger pulls, works with both brush and brushless motors in High Speed and High Torque configurations and increases the reliability of the replica and protects internal parts in the event of overload due to motor damage or battery drain.

Kestrel™ Basic chip features:
• Binary trigger. the replica will fire when the trigger is pressed and the next shot will be fired when the trigger is released.
• -Pre-cocking is programmable in 5 stages with a piston position learning function.
(Function requires several single shots after connecting the battery for calibration)
• Active Break. the replica performs a full cycle with each shot so that no unnecessary overload is created in the GB due to performing part of the cycle.
• Locked Rotor Protection, a function that protects the inside of the replica in the event of motor damage
• Battery Drain Protection, protects against battery drain. The motor vibrates, the blue LED lights up five times to indicate battery discharge
• Low/ High Voltage Protection. The module detects the number of battery cells and adjusts operation to different numbers of cells and voltages from 6V to 17V.