SpudFiles

Now that just looks cool With your permission hamsterdam I'd like to add it to my marble gun

Are you in the U.S. or from Hamsterdam?

I could offer some parts in trade if you would be willing to build one of your semis to fire my 40mm rounds. I have pressure chambers and shells ready to go.

i am from Western Australia so bit far for a trade. i don't know if it will work with larger/heavier shells because the spring needs to push them up the mag and out the gun. you would need some powerful springs or maby a small pneumatic ram.
if you have access to a lathe i am sure it is possible to build a much better gun.

i might be able to draw up some plans and send them to you. but i don't know if i can get access to a drawing program any time soon because i am not at Tafe any more and haven't found a job yet.

if building this some things to take in to account are;
-terrible air flow due to "probe" (purple thingy on diagram) restricting it.
-air loss through gaps between barrel/shell and bolt/shell. loss of pressure behind ammo due to bolt moving back.
-a larger chamber is needed so it will work at lower pressures.

Now that just looks cool With your permission hamsterdam I'd like to add it to my marble gun

Permission granted. post a link to your marble gun.

feel free to use this design just don't clame it as your own.

very nice I would like to say tiz dis es very nice, and yes I am back from long journey in elmira, NY fix'n houses.

some things I'd like to say the mag spring should be custom made from music wire, you ought to try my semi blowgun method on this

and a blow forward might work better because the force will push a decent seal on the cartridge and feeder

i did like your semi blow gun idea but i will wait until i get a compressor before i attempt this.

i don't know is custom springs will work because it needs to be able to fling the shell out and they might not be springy enough.

it is a blow forward, i am using a bigger chamber now so the leaks are not a big problem and are mostly caused by my inability to cut in a straight line on the front/back of the shells. also it happens so fast when shooting it is almost imposable to tell if it leaks