I just purchased a M&P 340 which is now my BUG - carried primarily in my front pocket where it all but disappears. My only complaint is that on hot and humid days, I've been getting some minor rusting on the grip screw. Is my best bet to replace it to try to find a simlar stainless screw at Home Depot, or does someone happen to offer the exact part in stainless already?

Thanks for any help you can give me. . .