M120 is supposed to be 400fps actually, though it's anywhere from 390 to 430
M110 is supposed to be 360, but is often 380ish
and M100 anywhere from 330-360
Every brand is different, depending how they test their springs I guess. Ehobby rates every spring about 100fps low and gives them a huge fps range, they must test them with a STAR M4 or something lol
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