The Mission Tetra XB HHA Scope Rail Assembly is a premium, purpose-built optics mounting solution for crossbow shooters looking to upgrade their precision and adjustability. This assembly provides a robust, secure rail engineered to accept HHA’s Tetra XB sighting systems and other compatible optics — delivering a stable, Picatinny-style platform for scopes on compatible Mission crossbows. Built with solid construction and designed for smooth, repeatable sight adjustments, this rail lets you quickly adapt your aim for varying distances without the need for complex shim setups or tuning. It’s ideal for hunters and target shooters who want to pair high-performance optics with a reliable foundation that enhances shot consistency and accuracy in the field.