(Bill Alexander of Alexander Arms relinquished its trademark status & opened the cartridge to industry development.) From page 20 of the [book of the AR-15] by Guns & Ammo. on the gun rag stands as we speak.
Hornady submitted the the cartridge as designed by Alexander to SAMMI and they accepted it. YAHOO!
Hopfully everybody will start making 6.5 Grendel barrels now. I know what my next build will be! Now do I choose an 18 or 20 inch bbl?