My daughter is small for her age (10 also), so I got her a Henry Youth Rifle. She picked the stock color-Orange-too. She loves shooting it and is getting really good with it. Don't worry how long it will last, worry more about having more time to shoot with him.

A rifle that fits him and gets him excited about shooting is an investment that will go far. If he outgrows it, and he wants a larger one; then that is a good quality problem to have.

Jason