calibers

Other than the 223/5.56, what are some of the other calibers (uppers) one can put on an AR lower? I know the obvious stuff.. 50 BMG (single shot), 9mm, 45acp, .22LR, 50 Beowolf.. anything else worth looking at? I really wish you could chamber the AR15 in 308....

I have received a big lot of ammo from a relative and want to sell the stuff I don't have a gun for. For sale or Trade. I have the following: 60 8mm lebel $45 obo 90 1938 8mm german mauser in stripper clips in original boxes (9) $35 a box obo 100 7.65 longue $70 obo 90 .32 acp $20 obo 40...

I have found this little chart to come in handy numerous times, so I wanted to share.