I thought so...the ammo says it costs "credits" and that I have to buy credits.
I have 50 cash on me, but it doesn't let me buy any ammo even if it only costs 5 "credits"
I assume its this one...
http://www.deadfrontier.com/
and I logged in, clicked "shop" since that was only option to where to buy stuff, and everything I see costs credits.