Snipers Hide Skull&White feather meaning.

[MIChris]

Please forgive me and Ill take all the lumps I have coming, What is the meaning(s) behind the Skull with the bullet hole and white feather available on some of the Snipers Hide merch.? I am assuming the White feather is in Honor of Sir, Hathcock. But I would like to know the true & factual meanings.
Thanks in advance, God Bless.