i was finally happy with a design then i had to come along and read this to find out all i have to do is turn the slide valve around for semi auto now i just gotta find a way to have a reservoir connected to the back of the gun, a chamber and it still look good.

i just bought a cheap qev and slide valve off ebay. I think i made the mistake of buying the one of the cheapest ones i could find to handle the pressure. any way the problem i have is the slide valve has the standard 1/4bsp fittings (one male and one female) and the qev has three female fittings ar...

thanks all the suggestions were more than i could think of. i had a bit of a look and the best bet in my opinion is brewing or aquarium tanks

I still prefer it this way.

As do i its still possible to get nearly anything just harder if your using it for the wrong reason

i have done a bit of searching and research on this although admittedly probably not enough. It has been discussed that dry ice can be used to refill paintball tanks and the amount needed in relation to volume Here . the problem is as i live in Australia i do not have access to any form of CO2 tank ...

16 year olds are more capable than ball valves

yeah ill film it and post it up on here not sure when ill get around to it though i dont think it would be much appreciated if i shot it at home and left glass everywhere.. wish i could get some high speed footage of the glass shattering

i built this a couple years ago now but only just started using syringe fuelling and a piezo to ignite it. roughly 1.2m barrel, 7.6L chamber and 5.3L Barrel. Ive been shooting 600ml coke bottles filled with water wrapped in a bit of electrical tape but i just discovered a wine bottle fits the barrel...

dammit i clicked the wrong one 16 seemed to be popular in the last thread must be when people get a love for destroying stuff

come to think of it i do agree with you the best thing about this gun is its simplicity adding check valves and burst disks would just ruin it

nice and simple i like it. im not great at these things but im guessing if you used a syringe and butane or propane you would be able to shoot a little further. i wonder if the lightercasing would be able to take 2x or 3x mixes?

i have a couple of questions about this. first is it ok to use the output as the input, will it hold the pressure the same? and if i get an 1/8" nipple whats the best way to install this in a brass fitting. Im hoping for it to go to 400psi and i tried drilling a hole and epoxying it in place but it ...

it would only look half as good without the holes

are you really going to hold 100psi with some duct taped broken pvc pipe

ok thanks i was thinking something like that but i thought inner tube would burn

i don't know if this has already been discussed here but whenever i make a gun or anything i just stand exactly 10 or 20 metres away from a wall and record the sound of the shot. i normally use coll edit pro but most sound programs should do it. you can then see the peak of the projectile leaving th...