After turning an 870 Express into an 18" home defense gun with a pistol grip, my son and I got to thinking that it would be fun (and even useful) to teach ourselves to break clays shooting from the hip. I can get #8 shot skeet loads cheaply, and by progressing from ringing suspended gongs to thrown clay birds, a particularly challenging game could be developed. No holding the gun above lower ribcage height allowed. Only 18-20 inch barrels allowed. Riot-type guns with extended mags OK. No tac-lights or laser aiming devices permitted. Screw-in chokes useful and acceptable. Is anything out there like this now?