Jaeger Precision demonstrates how to replace the nozzle on the GHK G5 hybrid lower to reduce its joule output. The process involves disassembling the gun, removing the old nozzle, and installing a new 1-joule nozzle. After the replacement, the gun's performance is tested, showing it now shoots at 0.95 joules, making it compliant with UK site regulations. He also mentions an issue with the full-auto function on the hybrid lower and hopes for a resolution from TAPP Airsoft.