[tongue-tied]

That is exactly what I have. With a Crimson Trace attached to the right hand grip.

[Myrddin]

Crimson Trace makes a good product. A nice fit for the 640. When I was checking the S&W site for the 640 image, I noticed they offer a new "Governor" model. Six rounds of .410 shotgun or 45 Colt. Very attractive and likely better built than the Taurus Judge that inspired it. I've see a "Judge" that failed with the barrel fractured right at the frame. No thanks.