I have a Model 19-3 that I need to replace the front sight on. I cannot see any pins,ect. to punch out to replace the blade, Is this sight pressed on or what???

There is a pin in the ramp below the sight. Try a magnifier and oblique lighting.....you may be able to see the pin profile.

Link to some added info.

19-3 Front Sight Pinned?

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Ret. LE, FA Instr, S&W Armorer

The front sight has red insert that I don't like at a--Wanna replace with solid black sight...Paint,etc doesn't stay on

I see 2 small pins polished into the barrel rib nut none on the sight ramp or sight--