Nice, but there are some things about your model that are a little different than the real thing...
1) The actual paint job is basic, low-observable, flat black.
2) The upper surface of the nose is a little more rounded, this is a sensor turret under a windscreen.
3) The real gun is a triple-barreled 25mm rotary cannon, yours looks like a single barrel 30mm with a large muzzle brake, similar to the one mounted on the fuselage of the Ka-50.
Its really a great model, and I don't know if yours was actually modeled after a real RAH-66, just thought you might appreciate some feedback.
Anyway, Bravo Zulu Mate. Great Job!