Features:

• Quick and Accurate Aiming: The flip-up fiber optic sights features visible front green dot and rear red dots, and the fiber optic provides the brightest aiming point for excellent visibility in daylight or low-light environments, two aperture options offer a rapid transition from cqb quick target acquisition to precision long-distance aiming..
  
• Easy to mount and use: Equipped with a spring-loaded folding part and an Allen wrenchfor easy installation and flipping up and down. Simply push in from the side or press on the top.
• Adjustment Without Tool: The front sight aperture adjusts the elevation, the rear sight knob allows the windage aperture to be moved left and right. Tool-free quick switching.
  
• Lightweight and reliable: High-density polymer construction, the solid and durable construction ensures sight steadiness and accuracy.
• Compatible: These flip-up sights are fit for 20mm-21mm 1919 rails. *Take the screw out before you mount, and nuts and module for secure rail connection.

Package includes:

• 1 x Front sight.
• 1 x Rear sight.
• 1 x Allen wrench.
• Extra set of mounting screws.