The A36 Brimstone is a Depot weapon that is purchased in-game from the Depot for 600 CP.
This weapon is a near-orbital airstrike that can be useful in objective game types like Domination and King of the Hill. It has a wide explosive radius making it a suitable weapon for taking out groups of enemies.
When buying the A36 Brimstone, you only receive the airstrike marker and will have to shoot a flare at the area where you want the airstrike to be deployed.
Depot weapon. Used to call down a powerful air strike.