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I just made a simple crossbow out of some wood and a bow I got a garage sale. I was thinking maybe i could make some sort of piston inside a chamber type thing to use it as a fast to reload, small caliber potato gun. I know they make bows like this for paintball but would it be possible to make and effective one myself. If so any ideas for how to do it.

Calling JSR.....

He made one of these once with... Guess... A syringe. from what i remmeber it worked pretty darn well.

This is especially how NERF guns work. They use a piston that is pulled back and a spring behind it that, when triggered, pushes the piston forward really quickly and compresses the air.

VH_man wrote:Calling JSR.....

He made one of these once with... Guess... A syringe. from what i remmeber it worked pretty darn well.

Here you go

mega_swordman wrote:This is especially how NERF guns work. They use a piston that is pulled back and a spring behind it that, when triggered, pushes the piston forward really quickly and compresses the air.

This is how all spring-piston airguns work.

Ok thanks guys I might try to make my crossbow into one, what sorta chamber size and barrel length should i do, would it be similar cb ratio as a pneumatic?

Ok I just made a prototype and it is pretty successful. http://www.spudfiles.com/forums/my-pneu ... 16496.html