I don't follow the 50 cal genera very close. Never figured I'd own one not having a place to shoot it. I do now have a place I can go out to 900m, but even that is a bit meager for its potential.
What ever became of those 50 cal. uppers that you could use a 1911 lower as the fire control group? I know the BATFE boys really got their nickers in a bunch over them. Did they manage to get them banned or does someone still make them?