** Shares of DroneShield DRO.AX rise 6.9% to A$3.785, extending gains from the previous session
** Stock top gainer on the benchmark .AXJO for a second day; AXJO down nearly 1%
** Defence tech firm on Sept 22 announced expansion of its R&D operations in the U.S. with a second location to its US headquarters in Virginia
** Stock has risen nearly fivefold in value so far this year