Just wondering if anyone has done it. I would think that offsetting a barrel in a stub so the fp strikes the rim at 6 o'clock would be ideal. My son is starting to shoot and his Cricket doesn't hold his interest. Fruit, sealed hot soda cans, clay pigeons, balloons, steel plates, and paper have all been used as targets. I'm thinking a firearm that is simple, yet to him appears more complex and grown up, may hold his interest and grow with him in the future. I know T/C has done similar with the Encore, but for a child I cannot see spending that kind of money for such a slight interest.
ETA: I'm guessing that the cost of stubbing a barrel and fitting the forend would be more than a Sportster even if you already had everything except the stub. Realistically the fp would probably have to strike at 12 o'clock too in order to keep from fabricating an extractor.