Mp7 is much better, because its cheap and deals more damage 
MP7 is better
mp7 deals more damage
p90 is son of a game
p90 xD
P90 if your up against a lot of poeple in one place, but if your attacking 2 or 1 guys MP7 is better
idk bout you but i prefer mp5 sd much more
mp7 best :d
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