jguilletjr
Saw Bones
It seems like since the gun Mfg. Make a conversion for the AR to a .22 cal, Why not make a magazine that would fit in the .308 receiver that would convert it to a .223 / 5.56? Then you could use your .223 upper on the same lower as your .308 / 7.62. That would be a really versatile system I think.