Dura Sight Durasight Picatinny Rail Base 20 Moa Short Action Cascade. 6x48 screws included. Specifications for Dura Sight Durasight Picatinny Rail Base 20 Moa Short Action Cascade: Manufacturer: Dura Sight Color: Black Finish: Matte Fabric/Material: Aluminum Length: 6.7 in Height: 1.1 in Condition: New Gun Rail: Picatinny Ring Type: Mil-std 1913 Picatinny Package Contents: Dura Sight Durasight Picatinny Rail Base 20 Moa Short Action Cascade Dura Sight Durasight Picatinny Rail Base 20 Moa Short Action Cascade