Includes front and rear sight. Both utilize a spring / ball bearing mechanism to flip up and down. <br><br> REAR SIGHT<br><br> Material: Aluminum<br> Weight: 1.59 oz<br> Pieces: 1<br> Rail Type: Picatinny/Weaver<br> Length: 1.24" inch<br> Width: 1.3" inch<br> Height: 1.87" inch<br><br> FRONT SIGHT<br><br> Material: Steel/Aluminum<br> Weight: 1.3 oz<br> Pieces: 1<br> Rail Type: Picatinny/Weave<br>r Length: 1.24" inch<br> Width: 1.30" inch<br> Height: 1.8" inch<br> <br> Front Sight Post is Elevation Adjustable with Standard 4-Prong Front Sight Adjustment Tool