Zius BK1S/BK2S MOSFET

The Zius BK1S/BK2S MOSFET is a direct replacement for the T238 unit that ships inside the blaster, and at this price point it's clearly the electronics component of the lineup rather than a basic mechanical part. A MOSFET sits between the battery and the motor, taking the high current load off the trigger contacts so they don't wear out as fast — swapping in a fresh T238 is the fix when the stock unit has failed or is causing inconsistent firing or a blaster that won't respond to the trigger at all.

Because it's the same T238 unit specified for the BK1S/BK2S, it's a like-for-like swap rather than sourcing a different board and adapting it to fit. Worth having on hand if you're running the blaster hard, since electronics tend to be one of the first things to go under heavy, repeated use.