There is an amphibious kit sold for the Glock 19 ??? that allows it to function underwater. I believe that it's for sale to LEO only.
HERE IS AN INTERESTING UNDERWATER HANDGUN TEST PAGE CLICK HERE.
This is a discussion on SIG under water within the General Firearm Discussion forums, part of the Related Topics category; did i mention i love that show...
I Never "Carry" while "in the water..!"
QK - interesting link.
Seems like they were seeing 4' as more like a dangerous distance - further than the Mythbusters tests.
Chris - P95
NRA Certified Instructor & NRA Life Member.
"To own a gun and assume that you are armed
is like owning a piano and assuming that you are a musician!."
http://www.rkba-2a.com/ - a portal for 2A links, articles and some videos.