any ideas for a 1 1/2 inch piston?

[djt]

anyone have any ideas for a 1 1/2 piston? im looking to make a coaxil with a 1 1/2 inch chamber and a half inch barrell. just wondering if anyone had any quick piston ideas. i could also try a diaphram too but i dont know what i would use.

[Atlantis]

I made a piston for 1.5" Pipe out of a D or C cell battery wrapped in duct tape with a rubber ball glued on the end. Milk caps glued or screwed together will also work.

[djt]

actually i kind of changed my mind on this one. i think im going with a diaphragm. i have heard that the thin tupperware material works well. any ideas on a diaphragm?

[Atlantis]

That's the only thing I've heard of working besides neoprene washers. Some mousepad bases might work. I prefer pistons because you can always make them bigger, with diapraghms they only get cut smaller on accident.

[djt]

true true. im just trying to make this small gun as compact as possible and i believe diaphragms take up the least space. ill have to get the parts wednesday and start building.

[Infernal2]

I've had a hell of alot of success with using PVC sheet shower and bath liners as diaphragms. I think it's $5.50US/ft at Home Depot. It's very thin, very flexible, and very slick.

I've also used it to wrap a piston to make it slide through my coaxial.