Negligent discharge is 100% of time user induced. I don't know, but my guess is that there is a negligent discharge for every gun manufacture.
You can sling "evil glock" insults all day long, and post links of glocks "shooting" people, but it all boils down to operator error / complacentness, not the manufacture of the firearm.
As to the original post, cool stuff, nice to know my glock will shoot underwater, looks as if unless I am less then a foot away from my target it is pointless.
For concealed carry, you can’t control your draw, like you can in a outside holster.
A glock was made for police officers/ military with outside carry.
It works great as such. For concealed, if you are stupid enough to carry a gun with no effective safety, or one what may discharge when dropped, then you won’t be passing many of your genes on.
You can keep your stupid “glock can shoot underwater” because that’s about as useful as the other BS marketing glock does. The funniest one was the “advanced polymer gun” crap. Frankly i don’t care if the non-shooting parts are wooden furniture, or polymer, or metal. If metal, the only problem is weight. As for concealed carry, I try to stay < 20 ounces loaded. I carry frequently. 9mm, and a very accurate make. I also carry a spare mag, and a one had assist open knife.
Glock is not evil — just the wrong tool for concealed carry. This is one reason more and more compact subautos are coming with (1) manual safety and (2) drop safe protection...
Google pocket auto comparision, and there is a very good comparision of every major carry pistol (but not the surplus stuff like markov)