How do you use your four weapon slots in Far Cry 3? I own the Go to a shop, and then go to the weapon you have (or want to buy), and then. You need to craft a better weapon holster. It's the same process on how you got the 2 weapon holster; you got a Goat skin and crafted it, you. For Far Cry 3 on the Xbox , a GameFAQs message board topic titled the gun, select "equip", and choose the slot you want it assigned to.