Hristo Airsoft Trgovina show the Specna Arms CORE series that come equipped with the new HAL ETU. HAL is an electronic unit designed for peak performance that gives the user precise trigger response using magnetic sensors and Hall effect technology. According to Specna Arms, users can experience unmatched control and accuracy with the active brake system and crisp, consistent firing from the binary trigger. Customization is also a breeze with HAL's intuitive trigger interface, and a low battery alarm.