informational purposes only
I wouldn't really want to even try the second design in the first video, although the first half of the video works pretty well, even though it is very elementary and old school. Both of my form 1 suppressors are roughly based on this design, though a lot better specs and materials.
[youtube]http://www.youtube.com/watch?v=_0ah0X92wdY[/youtube]
[youtube]http://www.youtube.com/watch?v=qSj919xxXC0[/youtube]
[youtube]http://www.youtube.com/watch?v=rRdcAgmrOK4[/youtube]