Spc. Adrian L. Avila, 19, of Opelika, Ala., died Oct. 29 at Khabari Crossing, Kuwait, of injuries sustained from a non-combat related accident.   He was assigned to the 1343rd Chemical Company, 151st Chemical Biological Radiological and Nuclear Battalion, 115th Fires Brigade of the Alabama Army National Guard, in Fort Payne, Ala.