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Aside from its deeper than average notch, an unusual and unexpected benefit of the MMC adjustable rear sight comes from the fact that its elevation is adjusted via an eccentric cam, so that the higher it’s adjusted, before it reverses direction and starts back down again, the amount of elevation change per click gets very small. The .245” front sight keeps the rear sight up within this fine adjustment range.

Sadly, they’re no longer made.

Every day’s an adventure.