It says it ingame when you right-click the mags.
Civilian grade, Military grade or Ranger grade correspond to the ammo types

So I have to get all of the guns and get all of the ingredients just to know what guns uses what?

For example, this site: http://fas689.wix.com/fasland#!wstats/c14xv

It shows the: Damage, Range, Recoil, Firerate, Accuracy, Magazine Capacity, Fire modes

But it never mentioned what Ammo Type does it uses.

You only have to spawn the mag corresponding to the weapon to see what ammo is uses.
If you want you can ask Fas to put the ammo types in the info of the gun.