Sergeant McGinty was ordered to the West Coast for transfer to the Far East. Joining the 4th Marines, 3rd Marine Division, in the Republic of Vietnam in April 1966, he served successively as a platoon sergeant and platoon commander, Company K, 3rd Battalion, as S-2 Officer and Operation Chief, H&S Company, 3rd Battalion, and as Operations Chief, with Headquarters Company, 4th Marines. It was in 1966, during Operation Hastings, that McGinty distinguished himself in the actions for which he was awarded the Medal of Honor.