Ammo yes
Water yes new camel back bladder in my cargo pack is a big improvement over trying to get hold of my water bottle on my back, only down side my rig weighs a ton if the bladder is full ! just have to drink lots i guess.
Comms i want a Comtac II but the real deal is out of my budget and the chinese are abit hit, miss or epic fail so unless i can get a reliable copy i doubt i will be getting coms anytime soon i dont even have a radio , but they are on my endless shopping list to finnsih my loadout.