That's one thing I have to give Ruger allot of credit for. Their Redhawk series has such a front sight. Where they fall short is they don't offer much from the factory, but there's allot of aftermarket options and they simply snap in! Not even a pin to mess with.
I actually had a custom patridge style front sight created for my original 90s vintage Redhawk from the stock sight by an interesting fellow down in Ringgold, GA by the name of Travis Strahan. He actually welded and machined it for something like $35 back in the late 90s. I think he did it for fun!
But I could, if I wanted to, get another stock unit with the red ramp insert and snap it back in, in a matter of seconds.
S&W does have such a thing on some of their revolver offerings. My 629 Classic and my 627 Pro both have it. I changed out the red ramp sights on both to a gold bead patridge style blade.