A short take by Maniek44 of the P9O MOSFET designed by Perun Airsoft. Perun for P90 upgrades your P90 airsoft replica by replacing the trigger bar and mechanical contacts with magnetic sensors for a smoother trigger pull. It also includes a proprietary cut-off lever to eliminate single fire issues. However, check compatibility before buying as it doesn't work with G&G and Krytac P90s.