Use one of the following entries with the give code:

ammo_bfg_small
ammo_belt_small
ammo_bullets_small
ammo_bullets_large
ammo_cells_large
ammo_clip_small
ammo_clip_large
ammo_cells_small
ammo_shells_small
ammo_grenage_small
ammo_rockets_small
ammo_rockets_large
ammo_shells_large