I feel ambivalent about armed helos being able to attack FARPs. I have managed to basically take a FARP mostly by myself using a Huey with only forward guns, rocket pods and a mortar crew. It flies rubbish with the rocket pods though, even with only 40% fuel and no door gunners. However, it is very dangerous as even the armed barracks is a massive danger, not to mention the shilkas. Never stopped me from trying though.