This sight set is for Glock 36 pistols and does not require modifications to the slide. It is a Heinie LEDGE Straight Eight design with a .156 wide and .120 deep notch. This sight design is great for one-handed clearance drills.
The “Straight Eight” configuration is one tritium dot in the front and one tritium dot in the rear that aligns vertically for fast acquisition in low-light situations.
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