What's the starting loadout (especially ammo) on the Challenge map?

The single-player Challenge map (from the Second Strike DLC) increases the difficulty compared to the vanilla game by showing only the minimum amount of information on the HUD. Among the things that aren't shown are hit points (not a big deal since getting shot is a very bad idea anyway), number of health syringes, and most importantly, ammo count. While I can keep track of how many rounds I have left before having to reload, I don't even know how many I start out with, and thus, whether I should conserve ammo or feel free to eliminate all hostiles I encounter.

Does anyone know what the starting loadout on the Challenge map is, especially in terms of ammo?