Although I'm generally a Smith & Wesson guy, I find myself shooting, and liking, a Ruger GP100MC more and more: https://ruger.com/products/gp100Matc...eets/1754.html. It shoots well, the trigger is good, and it's built like a tank. That said, I found some deficiencies with the OEM sights. The OEM Novak rear sight is not adjustable. The OEM Novak fiber optic front sight fiber diameter was too big for my preference - think big green blob. So, I set off to fix these issues.
First, I replaced the OEM Novak with an elevation-adjustable Novak:
The front sight was a bit more problematic. I first tried a Novak brass bead: https://www.novaksights.com/Detail.aspx?PROD=1100669. This just wasn't visible enough for my taste. Internet searches for "fiber optic Ruger GP100MC front sight" were mostly fruitless. I finally called Dawson and asked for their advice. Dawson suggested that given the Ruger GP100MC uses a standard Novak front sight dovetail cut, this would work: https://dawsonprecision.com/novak-cu...-front-sights/. I went with the .265 x .100. With just a bit of filing, I was able to drift the Dawson into place. I now have elevation adjustment and a cleaner, more visible sight picture. More better. From the Big Empty, ELN.
Here's the progression left to right - OEM Novak fiber optic, Novak brass bead, Dawson fiber optic:
Dawson replacement:
Dawson installed:
New sight picture: