I have Hogue square butt rubber monogrip on my Model 19, works great, takes 2 minutes to put them on.
https://www.hogueinc.com/grips/S&W/kframe/squarebutt
Yes it is an older model. The action and trigger are super smooth but just can't shoot it for anything. How can I find something that will work? Have success will 1911 and Ruger GP 100 factory grips but not S&W 10 grips.I have a plethora of k frame grips in the grip drawer, I assume you need them for a square butt