Dawson Precision Glock MOS Fixed Co-Witness Sight Set (For Trijicon RMR / Vortex Viper and similar red dot scopes) 

Fits: GLOCK 17, 17L, 19, 20, 21, 22, 23, 24, 34, and 35.

Use the .395 Tall Rear Sight with the following scopes: Trijicon RMR, Vortex Vipe & Similar Scopes

• Dawson Carry Fixed Rear .395 Tall x .125 Notch Width
• Dawson Fiber Optic and Black Front Sight .390 Tall x .100 Wide, Tritium .125 Wide
• Easy to Install – Sight Punches, Allen Wrench and Instructions Included!
• CNC Machined From Bar Stock to Exacting Specifications
• Part # 310-264