I've got an S&W M22-4. Soon after I bought it I sent it back to the S&W Performance Center for their Combat Revolver package and replacement of the too-short front sight. The roll pin holding the front sight tends to walk out after firing a bunch of rounds. My instinct is to tap it most of the way out, hit it with some red Loctite, and tap it back in. Is there a better way to do this?