If I cut a stock for youth I drill it for dowls 1st . There are gobs of materials around to do build ups w/. That are easy to work and look good ,in most cases . I wouldn't do 1 on say a decent double w/nice wood out of 3 tone acrilic . W/a matt black composite I might do black and white lines like the old white line pads . Lexan is nice to work and is generally available from 1/8 to 1/2 thicknesses.
For something like that Browning I'd buy the stock if it were wood.