Better yet skip the .410 AND the 28 gauge and get a 20g. A lighter weight 20g with 7/8 oz loads will outperform both and still have light recoil.Skip the 410, get him a Mossberg SA28. The recoil won't be much more, but the 28 gauge is much more effective on birds.
Yes a gas operated semi auto 20 gauge, would be an excellent choice.Better yet skip the .410 AND the 28 gauge and get a 20g. A lighter weight 20g with 7/8 oz loads will outperform both and still have light recoil.