So I found this vid on Youtube:
Kamov Ka-58 'Black Ghost'
Probably best without the dramatic music score, but otherwise an interesting idea, a stealth Ka-52. Looking further, it seems to be a hypothetical helicopter created as a model kit and used in Eugan game's 'Act of War':
Act of War wiki link
The kit was distributed by Revell, but originally made by Zvezda Models in 2000 as a Russian RAH-66 analogue.
In any case, I thought it looked neat and could be a fun OpFor addition to ARMA. What does everyone else think?