It's a good sight - I know some competition shooters who use
That's the overmolded sight which I think is only one Hi Viz is making for the M&P. Here's how Hi Viz describes it.
What is the difference between overmolded and interchangeable pistol sights?
The interchangeable style sight allows the user to interchange lite pipe colors due to varying light conditions and or personal preference. This is a sight predominantly used by competitive shooters and the everyday shooter. The overmolded sight is a sight that does not allow changing of lite pipes. This sight has an optical grade resin injection molded through the metal base of the site and around the lite pipe. This sight is predominately use by Law Enforcement, Concealed carry and the everyday shooter.
I know quite a few IDPA shooters who use this sight and like it and seem to have no problems with it.
It should hold up well. Disadvantage is you can't change the lite pipes. If you want to be able to do that you could check out the sights Speed Shooters sells and order some extra lite pipes or rods. http://www.speedshooterspecialties.com
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