A server update has just been pushed. This update allows the Autobuy plugin to adjust the provided ammo by multiplying the base count by the amount of mounted pods.
Simple maths: 120 base rockets * 2 pods = 240 rockets. 120 base rockets * 4 pods = 480 rockets.
This purchase is only possible through Autobuy for the time being and is experimental. We're looking to see how this will affect the general balance, and potentially later on unlock this for other ammo types. You will not be able to manually buy more than the base amount of rockets via the equipment dealer as it requires client hook modifications and we're still running in a bit of trouble with that, so once again, this will only work if you have autobuy activated for munitions.