OK I have personally held the black 4566 in my hand. It is integral rail. The troopers got to buy their old silver guns back for a little less than 500 bucks. It is a very nice gun just like the guns they replaced.
The admin at WVSP are old war horses and have had a S&W in their holsters for a LOT of years, and dont want anything else right now. They will not allow a GLOCK for another generation or two of troopers. The DNR and DOC have both switched to the 21 SF.
I have a a privileged position to know about the selection process, and what is going on in the inside based on some people I know. S&W did NOT want to make these guns for them and had even went so far as to disassemble all of the machinery to build the 3rd Gens in Springfield. They were going to give them a lot of M&Ps for free with holsters and mag pouches to egt them to switch. WVSP flat refused.
S&W moved all the machinery to Houlton and reassembled it just to build these guns.
I personally know both the Glock LE rep for WV and the S&W rep for WV and Glock had the lower bid but was not chosen. There is a lot of speculation why that I wont get in to.
I do have access to a picture. I deleted mine by accident and will have another one sent to me. AS soon as I get it I will post it here.