AmeriGlo Protector, Night Sight Set, For Glock 17/19/22/23/24/26/27/33/34/35/37/38/39, Front/Rear, Green Tritium Orange Outline Front, Black Serrated Rear GL-433 Employing a glare-reducing black serrated rear sight paired with a tritium ProGlo front sight" the Hackathorn Sights are designed for quicker front sight acquisition and maximized concentration on the front sight blade.