Do you think a 2" long piston would be good?

And yes the gun is a coaxial

Is just the size of the chamber not enough to base the size of the piston off of?

The chamber is 2 Feet of 1" copper pipe

I know this is a frequently asked question, but i cant find a good piston for my gun. I am making a copper piston gun and the Chamber is (1" )copper.
In my town i have a Lowes hardware store. If there are any materials there please tell me.

Thanks

good work BtB glad to see it firing

gun looks very impressive firing

it would be awesome in paintball!

That is amazing

videos would be great. nice and sleek too 8)

idk what the stock is, but the gun is very sleek and nice.

VIDEOS...plese

that gun looks amazing and powerful great build.

Great gun. I love the clean design but..

as everyone said before.. reduce the deadspace.

great gun and a video would be awesome

haha to bad your friend shot out the windshield.. but hey it makes for a good damage pic

wow that is amazing..

its like a real high power rifle going off!!!

at 200psi you would get some pretty good velocity....

but for safety i wouldn't take your gun to 200 psi.

you could make the chamber a little bit bigger and use 150 psi and have some good velocity.

nice work BTB glad to see you have it working update us later

love the all metal look

i weould think to make the barrel longer for better velocity but your probably going for more power at a shorter distance

i would love to see a video of it firing.

keep it up

depends on the size of holes you drill..

its possible if they are big enough