Perun V2 is a device that replaces mechanical contacts in version 2 gearboxes with an electronic circuit based on MOSFET transistors and standard wires with high quality low-resistance wiring.

Elimination of mechanical contacts solves the problem of their gradual wear. MOSFET transistors utilized in Perun V2 have a much lower resistance than contacts, which increases rate of fire. Small elements in the trigger mechanism responsible for semi-automatic fire frequently malfunction, especially in replicas built on parts made by many different manufacturers. Perun V2 minimizes the number of moving parts, increasing reliability and ensuring proper functioning of all firing modes.