Remove the visible hangers on and then take it out and shoot it. The high spots on the poly rails will smooth with break in. Kinda sucks that they ship guns like this, but labor ain't cheap. Should not be an issue for you at all.
I'm not really sure what a Kahr P230 is, but the above assumption is that you meant the Kahr P380.
I'm not really sure what a Kahr P230 is, but the above assumption is that you meant the Kahr P380.