Stu of Patrol Base features the Delta Armory ETU Series in this episode... "The Delta Armory’s new ETU series, “Fully Upgraded - No Compromises,” is distinguished by its comprehensive upgrades and near-complete Electronic Trigger Unit (ETU). It boasts CNC 16:1 gears, a CNC piston head, nozzle, stainless steel cylinder, and spring guide, a high-torque motor with strong neodymium magnets, a full metal teeth piston, and a precision 6.03mm barrel. The ETU unit features pre-cocking for faster trigger response, a binary trigger for double shots, and a burst mode for triple-dose shooting. The processor-enhanced ETU response offers better cadence and trigger action than traditional mechanical trigger contacts. The series also includes a Deans T connector, replacing the small Tamiya connector. Given the high-quality internal components, 11.1V LiPo batteries are recommended.