Perusing through the Armalite web site today I found they have added to their list of calibers in the AR10T model the 338 Federal. It comes with a 24" match grade stainless barrel, two stage match trigger and flat top upper half with a gas block flat top front sight rail. Though a little heavy with this barrel (probably lighter than the 308) but would serve well as AR style hunting rifle for the bigger of the big game.
This 338 Federal is going to be a winner of a caliber and it's nice to see it in an AR platform.
Armalite also has the AR15A4C carbine in 6.8 SPC and 7.62x39. Those light weights will be great additions to the grandkids arsenal, all to match the youngest grandsons AR15A4 5.56 rifle. Lets see, the six eight seems like a good girls rifle. Does magpul make a purple colored, six position butt stock?