Ammo, 20 rounds

The weapon or defense requires ammunition to fire. Each round’s cost is listed after the weapon’s cost, and a number of rounds equal to the weapon’s Ammo rating can be fit into one free mass unit. For example, a torpedo launcher can fit the magazine and loading gear for four torpedoes into one free mass unit, and each torpedo will cost 2,500 credits. For each ship class larger than the minimum required to mount the weapon, double the stored ammo per unit. The weapon itself includes one free mass unit worth of ammunition as part of the installation, so simply mounting a torpedo launcher alone on a frigate gives the ship four rounds of ammo.