Plus, it has the added advantage of making your banned 30 round 5.56 mags into perfectly legal 10 round .458 mags - how is it your fault that they also happen to fit 30 rounds of 5.56?
I doubt there's going to be any sort of a mag ban, but I gotta say...that's a frigging loophole if I've ever seen one...
Fortunately, I have it from a reliable source Diane Feinstein doesn't hang out here...
But I'd be willing to bet the manufacturers already have this one in their back pocket. After all, what liberal is smart enough to know this?
10 round .458 mags, anyone?