I think 1 is supposed to be ammo with reloading, but endless reserve ammo, but it doesn't work. Either 0 or 2 are endless ammo.
That doesn't make sense. Each weapon varies in ammo capacity, yet there's only one textbox? It should be replaced with a checkbox.
That box is to set what kind of ammo system there is (three ammo systems, one doesn't work) not how much ammo is in each weapon...