Do you need to buy ammunition for each weapon you buy?
I see nobody bothers to, but it is still sold.
how will your weapon fire without ammunition? :confused:
This doesn't belong in the Technical forum, as it's a roleplay question.
All things like this are dependent on you, and the people you RP with. I think one of the reasons many storefronts don't sell ammunition is that it gets used up quickly. So, you can't keep going back for more: it is assumed that you have the means to produce them. You might choose to base this capacity on, say, your economy, and the strength of your Arms Manufacturing industry. But, really, it's just a roleplay concern, and is down to you.
And it's unlikely, I feel, that people will ask you for exact numbers of rounds. It generally takes a long time to exhaust supplies, so unless you're waging a war of attrition, or using a very small force isolated from your base, you probably won't need to account for ammo production.
Wait, though, until you get an answer from a more knowledgeable RPer. In the meantime, you might look at one or two logistics threads in Sarzonia's post in the II Consolidation Sticky.