Twin Coaxials

[iPaintball]

When I made these, I wanted two of the same size, but I ended up short of pipe, so they ended up as fraternal twins. Chamber is 1.25" pipe and barrel is .5" I usually shoot marbles and batteries out of them.
This is the smaller one:

Here the are side by side:

Looking in the chamber:

Barrel end:

[experament-u2]

they look rely nice well done
what did you use for a piston? could you post a picture of it
and do you use the same pilot setup and piston for both guns

[Pyro Ninja]

How powerful is the small one...because im trying to get around to making a coax pistol....nice guns..

[iPaintball]

I used a 3/4" endcap with a piece of neoprene bolted on it. The small one is actually quite powerful. It can shoot a marble through 1/2" plywood.