There are a large amount of issues with the Xbox 360 controller on ArmA 3. Why has this not been fixed? It has been assigned for way too long and this makes the game unplayable for people with disabilities due to the lack of basic function compared with the preset with ArmA 2.
http://feedback.arma3.com/view.php?id=940
(Please do not discuss keyboard and mouse clashes with gamepad. This is not the place.)