If you watch YouTube videos, I am sure you have seen videos on dual sector gear (DSG) guns, and their quite unrealistic rate of fire. If you are not familiar with the workings of a gearbox, you may be wondering: how on earth can a gun shoot that fast? The concept is actually quite simple, in terms of how it works. In this article I will explain the differences between a single sector gear (SSG) and a DSG, with pictures to help you understand the difference in looks.
The concept of this is fairly straight forward. Because you have half the teeth (per cycle) than that of a SSG, it will increase single fire trigger response. Why? Because the motor and gears are only pulling the piston back half way than that of a SSG. A SSG allows the gear to cycle faster. It is the same with full auto; the gear is giving you two cycles per revolution, so it will cycle twice as fast (at least).
With a DSG, the spring plays a huge role. Because there are only 8 teeth on the DSG (in this example), it would make sense that you would need a heavier spring, right? Yes, because the more you compress a spring, the harder it will spring back at you. Likewise, since the DSG is only pulling the piston back half way, we want a heavier spring to compensate, which is why you see M180 springs in DSG builds.