Special operators are getting a new rifle that can fire both 7.62mm and 6.5mm Creedmoor rounds as a replacement for the MK17 SCAR-H Special Operations Forces Combat Assault Rifle-Heavy, according to U.S. Special Operations Command. The MK24 Mid-Range Gas Gun-Assault features a “quick-change swappable barrel” that allows the weapon to fire both kinds of ammunition, said Navy Cmdr. Joe Vermette, a spokesperson for U.S. Special Operations Command. …