According to Business Insider
The multi-caliber sniper rifle “gives more flexibility to the sniper as to what configuration to put it in and what targets they are going after” because the weapon can be chambered in three different calibers, a US Army lethality subject matter expert told Insider. The Army, as part of its Precision Sniper Rifle program, and the Marine Corps, as part of the Advanced Sniper Rifle program, requested a total of 786 MRAD rifles for about $14 million in their latest budget requests.
Rather than force snipers to choose between weapons capable of firing different rounds for different purposes, the multi-caliber rifle can be chambered in 7.62X51 mm NATO, .300 Norma Magnum, and .338 Norma Magnum.
Chris Kennedy, the lethality branch chief for the soldier division at the Maneuver Center of Excellence, told Insider.
“It gives more flexibility to the sniper as to what configuration to put it in and what targets they are going after,” he added.