If you want a bow that's can your son can fully grow into my suggestion would be a mission craze 2 that's the bow I bought my 10yo and it's set at 19 pounds and can be fully adjusted to fit him has he grows
both of my daughters have Mission Menace bows... They are 11 & 9. These are great little bows for the price and are completely adjustable to grow with them. They have had these since ages 9 & 7. Great bow ... great price. They love them.
