What is this piece on the Bell 206? I asked this question which led to another question of mine, What it the long rod just past the top of the nose of the Bell 206B helicopter and what is it's purpose?
If you are referring to the angled pieces above the front window, and below the nose; they are referred to as the WSPS (wire strike protection system). Designed to shear a line before it wraps around the landing skids or rotor.

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