I' m looking for an action manga I saw a while ago and the only thing I can rememer about it is that the protagonist fought with something like a bone that was protruding from his elbow and it was called demon bone or something. Oh I also think there was a girl in the story too and he was protecting her if I remember correctly. Please help me with this .

Dawn - Tsumetai Te

http://www.mangaupdates.com/series.html?id=973

IIRC it could also be Kure-nai

i believe it's kishin douji zenki

Sounds a lot like Kure-nai, MC has a Special ability that called the Horn of Houdzuki, and temporary giving the title of Fighting Demon of the Houdzuki Style

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second that

Second this

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Thanks a lot guys for your replies I really appreciate it . It seems what I was looking for was Kure-nai after all!! Now back to reading hehehe......