I suppose some of it depends on how you define AD vs ND. To use the unfortunate example of the guy who got shot carrying Mexican, we can define that as ND. On the other hand, if he had just tripped and dropped the gun, probably AD. Its one of the good features of the Glock you mentioned (along with many other guns) that they are mechanically incapable of accidental discharge as long as you, quoting Tom "keep your bugger hook off the bang switch". There are exceptions in some weapons though. I love my old 3 screw Blackhawk, but it is simply unsafe to carry with a round under the hammer because it can go off if dropped. I still own it, but I either fire all five, or rotate the cylinder to put it back over an empty one. The same was true of my old .44mag model 94. If you load with pointed bullets, and slam it down butt first, bad things can happen. You need to know this stuff before buying/operating a weapon. If you don't own a gun and are worried, I would reccomend the Glock as there is only one thing to worry about and that is to keep your finger off the trigger. Reassure your wife of its safety by reminding her of how many PDs issue it. One of their criteria is making it both idiot proof, and being safe if a cop falls and drops it durig a chase.
FQ13