One of my comp guns is a 34 with a competition trigger set about 2.5 lbs. Glock armorers take some kind of secret oath not to install modified trigger in a carry gun, which is probably a good idea. At my range a couple of years ago, a competitor was shooting a 34 with a modified trigger, the temperature was about 5 below zero, and when his hand hit the butt to draw he put a round through his calf and out his heel. His finger wasn't inside the trigger guard, and all range activity is on video so everybody can see what's going on. A Glock rep was at the scene and inspected the gun while its owner was en route to the ER, and said that it was functioning perfectly - the only theory he could come up with was that the cold had contracted the firing assembly to the point that the trigger pull was less than a pound and the impact of his hand on the butt torched it off.