I guess I understand the view that it's not going to fix everything. It's a multi-faceted issue, and this would only be one part of having an impact on gun violence.
But does this really negatively impact any gun owners life? Is being forced to change your magazine more frequently enough of a deal to massively oppose such legislation? Obviously if criminals really want access to firearms they probably will find a way to do so. But shouldn't we make it as difficult as possible for them?
Let's say it is a minimal impact... 5 lives a year are saved with such legislation. Is your inconvenience in reloading your magazine clips more frequently worth more then those lives?