How do I purchase ammo? Salacia May 23, 2018 00:09 Follow Go to a Joker Ammo vending machine or similar (Ammo box, mobile supply equipped vehicle, mail terminal etc) bring up the inventory screen by pressing the key “F” and click on the “buy ammo” symbol , select the desired amount and click “buy”. Related articles Where do I get Grenades at? How do I resupply my ammo? How do I customize my vehicle? What is Error code 8? Comments 0 comments Article is closed for comments.