i have a pneumatic and a combustion. the combustion would work out cheaper and easier to build but onli has 1 setting for shooting things, reali fast. pnbeumatics all depend on how much pressure u use, so you can use them almost anywhere. in australian dollars i spent $35 for a realy powerful pneuma...

hydrogen can be made by mixing caustic soda with water then adding a ball of aluminium foil into it, this can be done inside a PET bottle and have a balloon over the top to gather the hydrogen that will be produce, or have a hose running to a container with a valve on it or even directly to the gun ...

well i noticed that a hydrogen ballon has a much larger, louder, and quicker boom than deodorant which is my current fuel. so i thought it could be too powerful but i was just askin if any1 had had any experience/success with it. and its a lot cheaper than deodorant. at the moment i am trying to get...

i was wondering if anyone has tried using hydrogen as a fuel. i have got a mix ready to make. it is very reali highly combustible and possibly too powerful.