Duke takes the Maruyama ISO 556 GBBR to a game at the Landing Zone in Hong Kong. The Maruyama ISO 556 GBBR is designed in Japan and manufactured in Taiwan, known for its user-friendly features and robust construction. It has fully ambidextrous controls, including a charging handle, magazine release, bolt lock lever, and selector switch, catering to both left and right-handed players. Additionally, it incorporates a clever dummy gas valve knob for quick and easy hop-up adjustments, and is compatible with VFC M4 GBB system gas magazines.