Abstract: Apparatus for discharging gas from a bottle of compressed gas include a compressed gas release having on that bottle a compressed gas outlet having a closed position and an alternative open position. A shuttle has a first position spaced from that compressed gas outlet before and after opening of such compressed gas outlet and has a second position at such compressed gas outlet. The shuttle includes a temporary compressed gas flow restriction at the compressed gas outlet in the alternative open position of such compressed gas outlet. A system for discharging gas from a bottle of compressed gas closes such bottle with a burst diaphragm, subsequently penetrates such burst diaphragm, momentarily reduces flow of compressed gas from the bottle at the penetrated burst diaphragm, and thereafter removes the reduction of flow of compressed gas from the bottle at the penetrated burst diaphragm.