Instead of starting a new thread I will use this one to ask everyone what color/style wood would look best on this stainless beauty.
I really like the Secret Service grips.
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I've shot my 640ND with both the wood and rubber boot grips. Granted the wood looks nice, but she's not a BBQ gun, and the rubber is much more forgiving with recoil, and sweaty hands. I also have the same Uncle Mikes pocket holster, works great, just don't slouch while sitting, the holster will stay put, but not so much the gun. I've gone to a Don Hume french curve for better retention.