When mapping commands to my wired xbox controller fire does not map to left trigger, it will how ever map to other buttons.
Secondary: when using xbox controller scheme there is no way to invert the Y Axis, using mouse inversion does not translate into y axis inversion on con troller.
the game works much better with mouse and key than a controller you just gotta get use to it, but i understand the need to use one being a long time console gamer
I use my wired xbox controller for flying jets/helos and have the same issue. My controller mapped perfectly for Arma 2 and Arma but in Arma 3 I can map all of my flight controls except the shoot button to the trigger not sure why. One idea is that after you map it, it shows right trigger as being read as an X-axis button not a trigger? Might be the game is reading the button wrong. As far as infantry and ground vehicles I prefer the good ol keyboard/mouse combo.
They give the player the choice to use a controller to play the game. If they do so, they have to support it and make sure that it works properly. There is nothing more to it. The controller can be very useful in this game. I have the same issue and I hope it will be corrected.