Hello all,
I am having the EXACT same issue as the OP in this thread:
http://forums.bistudio.com/showthread.php?t=73527
I just got regular ArmA2 through Steam yesterday (no exp packs yet) and I play every game with my Right Mouse as Fire since Doom 1.
In ArmA2, it is only allowing me to fire in semi-auto mode, grenade launcher, and the main tank gun on any tank. Nothing full-auto will fire with my binding, no other vehicle mounted weapons.
Can someone please help? I really want to get where I can enjoy this game.