Ravin Speed Lock Crossbow Scope Black. s time to pull the trigger. New Speed Lock feature lets you lock-in your fps adjustment for next-level confidence in your shot. Specifications for Ravin Speed Lock Crossbow Scope: Manufacturer: Ravin Color: Black Features of Ravin Speed Lock Crossbow Scope: 20 - 100 yard reticles Fog shock recoil and waterproof Fully coated lenses with red and green illumination Package Contents: Ravin Speed Lock Crossbow Scope Ravin R166: Speed Lock Crossbow Scope Black