Ammo for the 5.7 is hard to find, and pricey $$$$$$$. i would say if you like the feel of your AR, stay with it. Sig makes a great gun and it'll be much cheaper shooting.
Didn't get to hear the speech, but knew when I watched the TV friday that this would be the last straw and regulations would be right around the corner. So sorry for the kids and families affected by this tragedy and sad for responsible gun owners who will now feel the effects.
My wife just got me a new HK 416D 22 LR. Haven't shot it yet, but i think it is one beautiful rifle. Anybody here have one or any thoughts about it? Any suggestion on Ammo to use?