A lot of Systema SUPERMAX PTWs out there do not have an ambidextrous fire selector. There is no need to worry about that anymore!

This is the new gearbox from Systema that has an ambidextrous design element to it so you can switch it out with the older system and apply this to your PTW! It also comes with a fire selector so you don't need to worry about that. Hoorah to left handed use!

Systema Ambidextrous Gear Box Assembly 2013 PTW (Super MAX Version)
Metal Construction
Ambisextrous Selector System
Suitable For Systema Super Max M4/ M16 Series Airsoft PTW Series Airsoft Rifle
Include Gearbox, Trigger Selector Set