I would go with a trainer or lux if he can handle the full size stock and needs to learn how to use open sights.
He may be looking over the receiver sight with the comb height on the American stock. Don't have a receiver sight to try on my american.
I have a CZ scout that works with both scope and the stock open sights. The open sights aren't as nice as the trainer/lux though. I've been thinking about putting tech sights on the scout to increase the sight radius and get the benefit of a peep sight.
