I dunno...some times when my kid is runnin his mouth I give him a coke and it shuts him up. Maybe it works on rifles too.....LOL

Seriously to silence a weapon you have to trap the rapidly expanding gas and control the release to the enviorment that is what a "supressor" does

However if your friend was shooting a small caliber rifle like a .22, a coke bottle with the bottom cut out would deflect the sound waves away from the shooter. However a piece of platic over the end of a barrel is VERY DANGEROUS

And yes a potato will work as a supressor once, after that its a french fry (if ya didn't blow your face off!!)

Last edited by Klow53; 01/04/12 12:07 AM.