Given his age, I’d probably get him a Red Ryder. I understand that’s going in the opposite direction, but here are my reasons:
- Inexpensive — he’ll have plenty of time for nicer BB guns when he’s a little older and can appreciate them more, and inexpensive means you could buy 2-3, and impromptu shooting competitions are fun
- Low/no maintenance — pour BBs into it, lean it in the corner when finished shooting
- Simple, easy to use action — he’ll be able to shoot it without constantly handing it to an adult, if his family wants that
- Low velocity — you can somewhat see the BBs arc as they fly off, so it’s a great opportunity to learn about trajectories and holding for elevation, plus lower velocity could mean lower collateral damage to surroundings, and, he’s already got a .22
I’m all for your nephew having all the best BB guns there are, but I’d argue that right now is about setting foundations, and a Red Ryder, or 3, is great for that.