To fire at a target using the 30mm internal cannon,
wait until the pipper (an X sign) appears in the
crosshairs on the Combat HUD. The X indicates that
the gun has been properly boresighted and the helicopter
is within effective firing range of the target.
Although your objective may be to attack enemy ground
targets, it's a good idea to have at least one assault
helicopter in your team armed with Igla air-to-air missiles,
just in case the squadron requires immediate air support.
Need ammo just hit CTRL+END and you will hear get ammo on
the LCD. You will see a red > arrow; follow it to the base
and land at the white heli marker! Also repairs chopper!