ammo
n. uncountable B2 Upper Intermediate US //ˈæˌmoʊ// UK //ˈæməʊ// am·mo
n. bullets, shells, or other projectiles used in guns and other weapons. It is short for ammunition.
n. projectiles and the explosive charges used to fire them. Informal shortening of 'ammunition'.
The soldiers carried extra ammo for the long march.
The police officer checked his ammo before entering the building.
The general realized that without a steady supply of ammo, the front line would collapse within days.
Clipping of ammunition + -o.