123 pistol slot

As of the current release, the number of each 'slotnumber' command does coincide with the order of the in-game menu entries (starting at "Primary Weapon" - 'slot1'), so you can infer the console command for an inventory slot by counting upwards from 1 as you move down the list from "Primary Weapon" until you reach the item you want to map . situs slot jujur