Yeah that's tough. I'd have the same concerns about da triggers and da/sa hammers. I'd be thinking maybe a SA pistol (light trigger) but clearly an 18lb spring aint gonna cut it... I think you're on to something with the youth shotgun.... Or Joe's idea- can she operate a charging handle on a 10/22? .. And one of those butler creek folders :) Those handle like a bb gun and you can unload it in a hurry.