Who in their right mind could possibly care?

  If you're in a fight where yu think you'll need that much ammo, you have more trouble than magazine capacity. If you can't end a "gunfight" in two to four rounds, you have no business being in the fight. (Someone has been watching too many "Rambo" flicks, reading too many adventure comics, or playing tomany video games.

 Go ahaead, buy one of the gadget mags. Unless your puny AR has been converted to a SAW or you've been lifting a bunch of weights for a very long time, you'll not be apt to expend 100 rounds or to shoot the thing off-hand for any length of time - certainly not accurately. Get into that kind of "fight" and you won't be alive long enough to talk about it. Besides,one hundred rounds of ammo weighs a lot; these mitty machines are notorious for failure-to-feed issue; and, this crap is crap! 

  Don't waste your money. If you think you need a tactical advantage, you won't find it in massive amounts of ammunition hanging from your weapon or being sprayed downrange. Try using the space between your ears and spending more time practicing your shooting skills.

 I thought high capacity mags were outlawed?

THESE SHOULDN'T COST MORE THAN $50 EACH 

Greedy-assed bastards...