The latest version of the ARC rail system has been first introduced in the FAST SF BUMP next-generation parachuting training helmet. Building on its original functions, the system now includes a wire channel and has been designed for overall lightweight. This design initially stemmed from modifications made by many professional users, but now users no longer need to handle these issues themselves. They can directly secure the cables to the inside of the rail using zip ties, effectively reducing the risk of cable snagging. Furthermore, this rail is compatible with all FAST SF series helmets.