640 on a K frame

[GRT3031]

6 shot K frame like a Model 40 or 640. 357, OR on an N frame in .45 ACP

 

[ibewbull]

It sounds interesting but there are options.
Bianchi made a Lightning grip which shrouds the hammer.

lot # 8 Bianchi Lightning hammer shroud grips "K" frame Smith & Wesson revolvers | eBay

I have a set but don't like the sticky rubber used. It prints too easily.