Depending what engineering change (- number) your gun is could go a long way in determining what grips are correct for it. Aftermarket grips are fine but if it's a no dash or even a -1 you might want to get S&W combat grips for it. By the way I like Ahrends grips and I think they are a good bang for the buck.
617 no dash with S&W combat grips
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I have a 617 no dash as well as a 17-4. Is there a unique concern with the grips for these guns as to how the grips fit, or is your mention of what is correct for it just concerning that they are square butt?