In this quick demonstration by Prime Mech Airsoft, we get a closer look at a custom-built VFC KAC SR16 that has been significantly overhauled for high-tier performance. The exterior features a specialized URX FF RAS 5 rail, while the internal architecture is driven by a Gate ASTER II Bluetooth MOSFET paired with an 18:1 SSG gearset and a powerful T238 28k brushless motor. These upgrades result in a highly responsive system that delivers a consistent output of 1.4 joules when using 0.32g BBs, blending modern wireless control with robust mechanical reliability.