I just got a Burris Fastfire III sight for my new S&W 617 revolver. I do not like the cheap general purpose Weaver rail mount as it is rather large and puts the sight up high. There is a semi-custom one for lower mounting but it is rather dear.
So I have designed one in MasterCAM and milled it out on my CNC machine. Pictured below is the first prototype. There are a couple of tweaks I will make to the design but not much different in appearance other than some added 0.005" finish machine passes and a wider tang in the rear.
The machining looks rough is a couple of photos due to angle and lighting. Surfaces are very smooth. and will be even slicker with the pending finish passes.
The sight fits like a glove on the mount as does the mount on the revolver.