Cane made me think of a question when he posted the 458 SOCOM thread... Back in the day, the gun manufacturers made rifles and handguns in the same caliber for ease of carry. Now days they're making AR uppers in pistol calibers for fun and cheap plinking. On the same note, pig and dangerous game hunters rely heavily on 44 mag, 460 S&W and the 500 S&W. Now I think that this is partially because those rounds a powerful enough to get the job done, but can be carried in a small package (revolver vs. rifle). However, I'm sure there are people out there who would rather carry a rifle. This March will be my first pig hunt so I am purely speculating, but it seems to me that a 44 mag, 460 or a 500 upper for an AR would be great. You could have a round powerful enough to hunt dangerous game with, it would be the same round your "backup" (if you still carried it) uses and the ammo is cheaper than the alternative (458 SOCOM). Not to mention these rounds in a rifle would be easier to handle and be more accurate. Does this make sense or am I out in left field?