We used H&A underhammers. The rear stock portion removes with a screw. The stock can be sawed down to fit a youth. Then another can be replaced at another time. Or just glue the cut-off back in place. Not pretty but functional and will get the kids shooting. For the naysayers out there about the inexpensive H&A underhammers. Come visit sometime, I'll show you medals my son won with his and the stack of medals my wife won and some very good, albiet not prizewinning, targets I shot at Friendship with them. Downside, they are not made anymore and might be hard to find.
