so where is the best place to grab them up? i am going to get the .50 beuwulf from alexander arms to bust pigs with but i would like a .223 to plink with. a bud was building a 7.62x39 because the ammo is about 1/2 as much as the .223. anyone have a "ark"? how does it feed? is it accurate? i have looked at stag, alexander, rock river, dpms and a few others. stag looks to have some nice stuf. who have ya'll delt with?