Thread: .22lr suppressor volume ?

I'm working on a .22 rimfire suppressor design at the moment and was wondering if anyone has an old Silent Kill suppressor that they could measure for me .
The Silent Kill used a PVC tube that had no baffles to capture gases , so its volume / size of the tube was bigger than the standard screw on type to achieve a similar sound reduction .
I'm just trying to figure out how much internal volume is required to suppress/capture/slow down the gases of a .22 rimfire when no baffles are used .
Can anyone give me an overall lenght and diameter of a Silent Kill .

Cheers .