Quoted:
Are there any other companies that make or plan to make 6.5 uppers?
I'm not sure if you're asking about companies other than Alexander Arms or other than the half dozen or so that already offer 6.5 uppers? Off the top of my head, I can think of these 6.5 players: AA, Les Baer, Black Hole Weaponry, Precision Firearms, Templar Consulting, J&T, Model 1 Sales, Loki Weapon Systems, SAOD. I'm likely forgetting someone. Does that answer your question?
After reading some on it, seem's like a logical choice to get one for hunting larger game with.
Yeah, if you want to stick with the AR15, I think the 6.5 is a better choice for deer/hog-sized game than the 5.56. There are certainly other entirely satisfactory caliber options, such as the 6.8 or the .458 SOCOM, but I'm partial to the 6.5 myself.
Also if it performs like they say might be the next us army issue caliber??
Although I wouldn't mind if it became the next army issue caliber, I think the likelihood of that happening is non-existent. I just don't see any caliber, whether 6.5 or 6.8 or something similarly sized, making enough of a performance difference to displace the 5.56.