I think the jury's still out on the future of the 5.7 round. I think it's the old velocity versus mass argument again. Still, a lot more people (sadly) will have to be shot with it in law enforcement and military contexts before we can begin to make any conclusions about effectiveness. Still, kudos to FN for attempting an innovation, even if, in the end, it dosen't work out. Serious defensive shooters are a conservative lot, with good reason, because we don't want to carry weapons based on unproven theories. Wish I had the cash to try the handgun or the carbine to get some initial impressions, but they are too expensive. Maybe Ruger should make a 5.7 rifle or pistol for a moderate price.