This selector is made for 'light weight trigger' in all shooting modes. It is made by precision CNC machined.
When installing the selector:
1) if the 1st screw is too much 'forward', no shooting is available.
2) if the 1st screw is too much 'backward', single shot mode will trigger full-auto shooting.
3) the correct position of the 1st screw is right between 'too much forward' and 'too much backward'.
4) the 2nd screw is the 'locking screw' for the 1st screw. Please keep the 2nd screw tight on the back of the 1st screw. Then, the 1st screw will not loose from vibration.
All products are for airsoft only. They are not made for real steel firearms.
