There is no fixing a broken cylinder like that unless you’re an expert and you know what you’re doing. Please don’t attempt to disassemble, puncture, drill, or cut the gas-cylinder itself.
The best way would be to get yourself a proper gas-cylinder removal tool, and watch some YouTube on how to use it and replace the gas-cylinder entirely.
I would suggest you just buy one replacement (you’re going to have to take it apart and see what you need) and then if everything works out then you can buy more.
There is no fixing a broken cylinder like that unless you’re an expert and you know what you’re doing. Please don’t attempt to disassemble, puncture, drill, or cut the gas-cylinder itself.
The best way would be to get yourself a proper gas-cylinder removal tool, and watch some YouTube on how to use it and replace the gas-cylinder entirely.
I would suggest you just buy one replacement (you’re going to have to take it apart and see what you need) and then if everything works out then you can buy more.