Dear Cg cookie,
I have recently asked a question which asked for recommendations for the noise of a bullet shattering. You recommended sound bible and YouTube but I had already checked those sources. Could you please recommend something else to me?
From Ivan
Outside of those resources for free sound clips you'll need to do a bit more searching. Finding free unique sounding audio clips can be difficult. I would just search online for "free bullet shattering audio clip" online and find one that you like.