I have several arrowhead bodies that look like that. I guess it could be for a flintlock gun although the material looks to be too grainy to throw a spark. I would have a flintlock user to look at it. My flintknapping instructor makes flints for guns and they are made with more bulk so the hammer does break or crush the flint. He also makes them out of a darker flint much like english flint. JMO
I know years ago when I started looking for arrowheads the guy that was teaching would tell me that my finds "can be anything you want it to be" and then he would laugh.