Two soldiers based at Lisburn’s Thiepval Barracks were killed in a car crash on Friday night.
Their car was involved in a collision with a tractor on the Ballyconnelly Road in Cullybackey on Friday night.
Lance Corporal Gwilt and Rifleman Harris, both 24, served with the 2nd Battalion The Rifles.
In a statement, their regiment said their “tragic deaths” had come as a “terrible shock”.
“David and Dale were much liked, professional and hugely competent soldiers who had fantastic futures ahead of them,” the statement said.
“The whole battalion is deeply saddened by their loss and our heartfelt condolences go to their families and friends at this most difficult time.”
Rifleman Harris came from Barnsley in South Yorkshire while Lance Corporal Gwilt came from Bedford in Bedfordshire.
A 21-year-old man who was also in the car suffered head injuries that are not believed to be life-threatening.
The driver of the tractor was treated at the scene.