This sight set is for Glock pistols and does not require modifications to the slide. It has two tritium dots in the rear; one on each side of the notch (no white outline). It is a Heinie SlantPro design with a .156 wide and .120 deep notch.
We feel this notch combo offers a "QWIK" acquisition of the front sight offering you confidence acquiring your target while maintaining accuracy.
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