I have a little Rossi 20-ga/.22LR if you'd be interested in that by chance. Shoot me a PM if you are and I'll send pics and whatnot.
I have an older single-barrel break-action 20 gauge that has been sized for little people. Works well. Shoot (ha!) me a text if you're interested.
I bought my son a Remington 870 20 Ga when he was 12. Its the smaller model and its been a great gun.
I have a mossberg Bantam 20 guage SEMI AUTO that has worked well for my boys. It is being passed on now but you may want to look at them. They come with extra stock pieces so you can increase the length of pull as they grow. The semi auto also kicks much less and it shoots 3" shells. It is synthetic and very light. If he is going to shoot waterfowl, this is a great gun. Ours is black. I actually love it for ducks. When I have all my winter gear on the shorter stock is fast to raise up and shoot quickly.
I believe that if a youngster is going to shoot many shells at all (and they should be with upland, doves, and waterfowl) they need a light, easy to shoot weapon. It as only about $300 if I remember right.
My son as out grown his youth 20 gauge pump. I can talk to him about selling. He has a .243 he would like to sell and upgrade as well.
I have an older single-barrel break-action 20 gauge that has been sized for little people. Works well. Shoot (ha!) me a text if you're interested.
Looking for a bantam sized shotgun for my son. Either a .410 or 20 gauge.
He really likes the mossberg 510 or the mossberg duck commander bantam.
Forget the shotgun. I hear kids using uzi's are all the rage right now.
If this is up for grabs. I would also be interested..