AR-15 Dual Low Profile Gas Block with Picatinny Rails Top & Bottom
AR-15 Dual Low Profile Gas Block with Picatinny Rails Top & Bottom, Low profile Fit for 0.75 inch BarrelTop and bottom picatinny rails for accessoriesHex tool to fasten and release onto the barrelHigh quality aluminum alloy in durable black matte finishShock proof designed for all caliber rifles Diameter: 0.75" (19mm)Top rail length: 1.4" (35.5mm)Bottom rail length: 1.9" (48.5)Overall height: 1.8 inch (45.5mm)Weight (net): 3oz (85g)