Sikorsky R-4 in a United States paint scheme:
And Alternate Universe time:
Some Sikorsky R-4 pilots in the field equipped their helicopters with spare weapons like M2 Browning machineguns and FFARs to provide a close air support role or for defense during search and rescue operations. Soldiers commonly referred to these modified helicopters as "Fireflies".
This particular aircraft is equipped with four M2 Browning machineguns and internal ammunition stores.