Sealed round

Bullets have been sealed rounds ever since the cartridge case was invented.

Many surface-to-air missiles (SAMs) and air-to-air missiles (AAMs), which are traditionally very maintenance-intense systems, are moving to this type of system.

Examples of modern missile systems which feature sealed rounds include:The MIM-104, S-300P and S-300V missiles are stored in cylinders, which they are ejected out of upon launch.

The AIM-54C missiles are not stored in any kind of container, but are sealed unlike the earlier AIM-54A and AIM-54B which exchanged fluids with the host aircraft.

Many infantry anti-tank weapons use sealed rounds; some—such as the US M72 LAW, the Russian RPG-18 and the Swedish AT4—also use the container as the launcher, so that the whole system is discarded after firing.