I am using a silenced tranq sniper rifle (because why would you not?) and of course, the silencer runs out after a time. So, I called a supply drop but was told that "some items are not available because of a lack of resources". I look at the iDroid and could not find anything low or just empty.
I looked at the official guide but could not find anything about that.
As a work around, I can switch the silencer from the machine gun. But I would like to know what I am missing so I can get some more of that.
Any one encountered this and can enlighten me?