I would like to know this as well. I know 7-08 and .260 and .243 are all based off of a 308 casing. If you have a 308 ar can you put one of these caliber barrels on and use the same mags and maybe an adjustable gas block??
I am very interested in this. Became a member of this sight to try and get as much info as I could before I build one of the MA-TEN receivers. PM on the way