WHAT DOES FRT-15L3 MEAN?

I have tried using quite a few different forced reset triggers, setting up with rare breeds primary. In the event the ATF started knocking on doors although, I disassembled it, grinded it up and tossed it during the trash as I failed to require any drama from the legally purchased trigger. Anyhow, these triggers are amazing. The FRT-L3 is the great