There are a ton of different kinds of pistols, and all have varying types of trigger weight. If you trained in a EU military, you probably trained with something like a Beretta 92 or CZ 75, both of which have a double action/single action (“DA/SA”) design, where the long DA is a safety feature. After the first shot, the gun will be in SA mode, with a much lighter weight for easier follow-up shots. One can also put a DA/SA gun into SA mode by chambering a round and cocking the hammer. Most consider this to be an unsafe way to carry a pistol without a further manual safety (both the Beretta and CZ have one for carrying in this manner).
Glock is the most common pistol make in the US, and they use a striker fired design. A striker fired pistol is typically equipped with a medium-weight trigger - lighter than a DA pull, but not as light as a SA.
Because the toddler shot himself in the chest, he was also likely using his thumbs, rather than index finger on the trigger. I think a toddler would easily have the strength to pull a striker trigger, and definitely a SA.
Granted, this is now almost a decade now but I was trained with the HK P8 which, according to what I can find, has a trigger weight of 24N (SA) and 55N (DA)
This would be 2.4kg force or 5.6kg force needed for pulling the trigger.
But as you said, it would make sense that even this is easily overcome depending on how you pull the trigger and the thumbs would be stronger doing that, especially with both hands.
My American brain can only understand lbs, but converting it, 5.6kg = more than 12lbs, which is on the high end even for DA guns. I believe both the Sig 226 and CZ 75 are around 9-10lbs in DA. For comparison, Glocks have about a 6lb trigger pull, which would be barely heavier than your P8’s SA trigger weight.
There are a ton of different kinds of pistols, and all have varying types of trigger weight. If you trained in a EU military, you probably trained with something like a Beretta 92 or CZ 75, both of which have a double action/single action (“DA/SA”) design, where the long DA is a safety feature. After the first shot, the gun will be in SA mode, with a much lighter weight for easier follow-up shots. One can also put a DA/SA gun into SA mode by chambering a round and cocking the hammer. Most consider this to be an unsafe way to carry a pistol without a further manual safety (both the Beretta and CZ have one for carrying in this manner).
Glock is the most common pistol make in the US, and they use a striker fired design. A striker fired pistol is typically equipped with a medium-weight trigger - lighter than a DA pull, but not as light as a SA.
Because the toddler shot himself in the chest, he was also likely using his thumbs, rather than index finger on the trigger. I think a toddler would easily have the strength to pull a striker trigger, and definitely a SA.
Granted, this is now almost a decade now but I was trained with the HK P8 which, according to what I can find, has a trigger weight of 24N (SA) and 55N (DA)
This would be 2.4kg force or 5.6kg force needed for pulling the trigger.
But as you said, it would make sense that even this is easily overcome depending on how you pull the trigger and the thumbs would be stronger doing that, especially with both hands.
My American brain can only understand lbs, but converting it, 5.6kg = more than 12lbs, which is on the high end even for DA guns. I believe both the Sig 226 and CZ 75 are around 9-10lbs in DA. For comparison, Glocks have about a 6lb trigger pull, which would be barely heavier than your P8’s SA trigger weight.