The "correct" finish for a standard Express would be the standard satin blue.
The Express has a bead blasted blue finish that's a dull flat black color.
The other finish available is parkerized, which is a medium gray color that doesn't match the bead blasted blue finish used on the Express.
The blued extension will be slightly shinier than the Express finish, while the parkerized will be as dull and flat as the gun, but the color will be off.
|