Posted 26 February 2013 - 02:12
Earlier model Glocks had a problem with accidental discharge, to the point where Detroit area PD officers started referring to the injury as "Glock Leg," a term still in common use in this area.
With automatics carrying one in the chamber isn't unusual, it's pretty much normal for cops and concealed defensive carry as you may not have time to cycle the slide to load a round.
The question is if the firearm has the necessary passive safety interlocks and if it has a double action trigger for that first shot. Double action only (DAO) pistols obviously do, Many single action pistols also have double action for the first shot and single action thereafter (DA/SA).
IMO only these automatic actions should be used for concealed carry, and indeed many police departments and some federal agencies require them - many going DAO only.
For revolvers the proper technique is an empty chamber under the hammer, or a revolver with a between the chambers rest position - something that's been around since at least the Remington New Model Army of 1858 (I have one.)