What channel is the Defensive handgun show on? Or is it onine?they covered this conversion on an episode of defensive handguns. the muzzle flip is pretty severe (on the converted g21 they tested).
also, if you google ballistic tests on 50GI JHP rounds--it only penetrates 6-7 inches of bare ballistic gelatin. the hollowpoint cavity is so large it expands immediately. hardly adequate penetration. the 50GI FMJ was no better than a 45acp FMJ costing 1/3 as much.
i'd leave this expensive conversion, and it's obscenely prices ammo for those who have money to burn, and nothing better to do.