Original sentence: Accidental injury can still be caused by putting one's finger on the trigger while drawing the pistol from its holster.Drop Safety:  the far end of the same extension bar locks the firing pin into place until the trigger is pulled.Firing Pin Safety:  a spring-loaded pin attached by an extension bar to the trigger assembly blocks the firing pin until the trigger is pulled.GLOCK pistols use an internal safety mechanism with three components with no external safety switch.Normal wear to the firing pin safety can and does cause the firing pin safety to fail.They are:.Trigger safety:  a lever mechanism contained within the trigger that prevents the trigger from moving unless intentionally pulled.When combined with other major component failures, such as a broken slide rail, Glock pistols may fire unexpectedly
Edited sentence: Firing pin safeties should be routinely inspected to ensure they are functioning properly.GLOCK pistols use an internal safety mechanism with no external safety switch.Normal wear to the firing pin safety can and does cause the firing pin safety to fail, when this was combined with a broken slide rail a Canadian policeman was shot in the leg when his Glock pistol fired while in the holster.Several improperly trained persons have managed to shoot themselves by putting their finger on the trigger whilst drawing the pistol from its holster.While some claim this is a safety concern others believe having to unload a pistol before dissassembling is just common sense