I would recommend [url=http://www.amazon.com/s/?ie=UTF8&keywords=shoot+n+see&tag=googhydr-20&index=sporting&hvadid=1695611621&ref=pd_sl_9qsc dgwdco_b]Shoot-n-See Targets[/b].
They are great for shooters of all skill sets. When you hit the target, it changes color to a bright yellow or orange ring that you can see from the shooting line. They are stickers, so they can be a-fixed to any medium from cardboard to paper to even metal silhouettes.
Next would be a gift certificate to a gun shop, or some place on line, that he might like to shop for gun stuff. Then he can pick his own stuff from all the available toys that are out there.
Best of luck.