I have never liked AR-15's. Not that I have anything against the rifle or anyone owning them. I have just never liked the .223/5.56 round. Seem too small for big game and too big for small game. I am in East Tennessee and most shots are under 50 yards on any game so I have no need to pop prairie dogs at 500 yards or elk at 1000 yards. But since all this get rid of "Assault Weapons" talk in congress and the media I have taken an interest in the AR-15. I have always thought that I may get an AR-10 someday because of the .308 round being more useful but with a little searching on AR-15's I have found that you can build everything from a 6.5 Grendel to a .50 Beowulf on the same lower. Now I don't have any use for a 6.5 Grendel as I already have a .260 Remington bolt gun, and I have heard limits on the .50 Beowulf due to AR bolt strength, I am curious about the rounds in between. For example the 358 Gremlin seems to have lots of promise but not a lot of details, and the .458 SOCOM seems interesting as well. I have also heard of a .358 WSSM or even a 7.62x39. I am wondering who has some of these more rare AR-15's, how they shoot, what they shoot with them and if they may stick around.