Expanding propellant gases are diverted through a hole in the barrel into a chamber.

The cartridge, also unique, plays an important part in sealing the gun to the escape of propellant gases.

That means it uses a nuclear thermal reactor to heat an indigenous propellant gas as a reaction mass.

For shorter ranges, part of the propellant gases escape to the side.

This is a two-compartment system, with no contact between the propellant gas and the beverage.

During dispensing, the beverage comes directly into contact with the propellant gas.

Propellants are burned or otherwise decomposed to produce the propellant gas.

When the propellant gas is expanded, the propellant molecules move away from each other.

It has the disadvantage of the propellant gas (and the accompanying fouling) being blown directly into the action parts.

These propellant gases push on the bullet base.