Probably few. As with most things lately, logic is rarely applied.
And 2 of my favorite rifles are single shots, soon to be a third.
I have a friend with a son who is very short, a long way from a regular rifle, but our Rock River Varmint in .223 Wylde with 77gr TGKs fit him perfectly last...
Our elk hunting mentor left my wife his Remington 30.06 Pump; I'll have to tell her the Amish Machine Gun thing, as first time I've heard it called that.