the advert says that it's 80 m/s
if you google 80 metres per second in feet per second you get 262 fps
would definately get this upgraded if it doesnt take it over 1J.
do the star 8.4v custom batteries fit this? im a bit rubbish at electrics and dont want to be messing about with normal batteries and ending up with a gun with a rubbish battery and a briken battery.