Armalite has come out with an upper chambered in .300 SAUM that will slap on to their AR-10 (T) model, just wondered if any of you had anything to say about this caliber, do you think it will be around for a while? There are so many different or hybrid rounds out there, don't know who will have the staying power. The .300 SAUM from Remington is a pretty slick round that would be a real hoot to shoot in the AR format. Just asking for a little feedback on those who have shot the round or the AR setup for that matter.