"Arma is a realistic military simulation, can you show a real life situation in which a hand glider has ever been used in an actual military operation?"
Not really, how is ArmA 3 a milsim being in the future with fictional or prototype vehicles/weapons that will probably never be common in any army?
ArmA is now a tactical shooter.
Secondly... why can this not be added as a civilian item? we have had camel bi planes in Armed Assault, we have civilian cars... why not I say.