AH-56 Cheyenne gunship that never made it into production from the late 60's / early 70's.
Modeled of drawings from online to proper dimensions in blender 2.79b.
.stl saved at 1/100th scale, so to get micro-armor size, scale it to 35% in your slicer.
the rotors can be made from thin clear sheet;
55mm diameter for the main rotor, and 10.5mm for the tail rotors.
As usual, the pictures show it printed at micro-armor scale.