Sounds like an imbalance between how other lists have reflected this effect. I an thinking of the roman Pila and dart throwing. This was justification for their impact foot classification. By the above definition shouldnt the romans have the same free attribute?
It's for shooting, representing massed use of atlatl dart throwers. With MF you get one die per two bases and a range of just 2MU. So it's not hugely powerful but it is free. We found when testing that it had little effect on solid lines of enemy foot but was reasonable against skirmishers or small BGs.
Spanish accounts made significant play of the missile showers that the Aztecs used.
Regards
Graham
I think its a missed opportunity in FoG to ensure prevention of freebies by increasing the granularity of the points cost.