This loading nozzle set by Bow Master is designed for the Krytac Kriss Vector GBB Airsoft SMG series. CNC machined using high-quality 6061 aluminum, this loading nozzle set is built to be durable and robust, while maintaining a lightweight profile. It features an adjustable gas flow output via an NPAS system. It is a simple drop-in installation and does not require modifications to ensure proper fitment and functionality. A must-have upgrade for bringing out the most out of your Krytac Kriss Vector GBB.