M&P Rear Sight Screw

T

THEZACHARIAS

New member
Long story short, I find myself needing to remove the rear sight sight on my M&P9 (factory installed Trijicon Novak style night sight). I have tried every allen wrench I can get my hands on, both standard and metric, and none will fit the set screw in the top of the sight. Does anyone know the exact size allen wrench required?
 
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