"I've read its the pilots are the ones who actually fire the guns"
the gatling guns are hard mounted. the pilot uses a sidemounted HUD, that projects a pipper/crosshair to center then they fire. The remainder of the guns are tied to LLTV, IR targeting and also electronic emissions sensors. The 25mm gau 12, and 40mm bofors are to be replaced by 2010 with the 30mm bushmaster, which will give airburst capability to the smaller cannons. The 40mm's are too old and are hard to service. There is also talk of replacing the howitzer with a 120mm breech load mortar. and lantirn pods with hellfire missiles for standoff targeting.