What a coincidence: just these days I dug out my 1/35 Pave Hawk and contiuned to work on it!
To answer your questions: yes, The Pave Hawk carries miniguns and they are included in the kit, but are as usual not 100% accurate. You could replace them with Cobra Co's minigun kit.
The kit also contains a pair of Browning M2 .50cal, which are supposed to be mouted in the door ways.
These machine guns are actually never installed on the field, because, being in the door way, they would hinder the rescue operations.