Are these the same cartridge? Once the Supremes do away with the AR15 bans, can you buy an AR15 for 5.56, and buy an upper for 6.8? Do 6.8 magazines fit a 5.56 lower? Or are the gun designs unique?
Are these the same cartridge? Once the Supremes do away with the AR15 bans, can you buy an AR15 for 5.56, and buy an upper for 6.8? Do 6.8 magazines fit a 5.56 lower? Or are the gun designs unique?
core of the answer:
"Both the XM5 and the XM250 can be quickly switched to alternate calibers. Swapping them from 6.8X51 to either 7.62X51 NATO or 6.5 Creedmoor is as easy as changing the barrel. "
not AR15. AR10. when it will be around, we will see.