Then it makes it just like any other AR10. You have to buy all new things for an all new gun. With the price of Pmags now days, i'd hate to have to buy some chambered for .308 when I have a gun safe full chambered for 5.56.

Arik hit the nail on the head with his post. If you want and AR10, that is the direction you should be looking. I'm not taking anything away from s&w because they make great products. But you cant argue with a Colt Ar10 taking a .308 and 5.56 upper, as well as accepting 5.56 mags in a .308 lower.

If the high cap mag ban comes around. You'll be kicking yourself for buying something in AR10, if u dont already have a nice stash of AR10 high cap mags. If u already have a stash of 5.56 mags, buy a Colt and then you have urself a very nice specimen that works with all of your mags.