ASR equipped with the latest eSilver Edge gearbox with “Super Dynamic Micro Chip Unit”, built-in Mosfet system that works together with magnet gears set, reinforced full steel teeth piston, quick-change spring guide and microswitch trigger that gives you instant trigger response when shooting. The circuit board of the micro-chip is replaceable, repairing is easy and friendly. The chip is programmed to protect the gearbox when the electric current is too high. Parts are TM compatible, which means a further upgrade is available if needs (except for the piston gear). The eSilver Edge Gear Box works perfectly under 7.4v to 12.5v – LiPo READY! The current is always stable at <11 Amps in any voltages between 7.4V to 12.5V. Low and stable Amps means it drains less battery and the lifespan of the components could last longer. Base on our testing, the response time of the switch is just 0.02 sec. With the short-stroke design of the trigger, it is unbelievable fast and you won’t feel any trigger delay when shooting. The replica uses low resistance cables and a T-connect battery connector.