AmeriGlo Classic Sight 3 Dot Glk 17,19,22,23,24,26,27,33,34,35,37,38,39 Green w/White Outline Front/Rear GL-113
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http://grabagun.com/ameriglo-glock-17-19-22-3dot-tritium.html?gclid=CNn31uW0srkCFVFp7AoduRgAiQ