The trigger response is great even when using the standard battery (I have tried that with a friend's 416D)
BUT, with a lipo (I use a 7.4V 1300mAh) it's even a bit better... but standard, the trigger response is MUCH better than in any standard AEG I have ever had..
So put in a BTC Spectre mosfet and you will have yourself a ptw trigger response! :)