Weaponbox (GoldSource Engine)
weaponbox is a point entity available in Half-Life.
It is a capsule with ammo and weapons inside of it. It can be found in Deathmatch or in the chapter Xen and beyond it.
This entity has no keyvalues in Hammer. Turn off SmartEdit and add the weapon/ammo name as the key and the amount as the value for it to work as intended.