WHAT DOES FRT-15L3 MEAN?

I have attempted various distinctive forced reset triggers, starting up with rare breeds initial. In the event the ATF began knocking on doors however, I disassembled it, grinded it up and tossed it in the trash as I failed to need to have any drama from the lawfully bought trigger. Anyhow, these triggers are great. The FRT-L3 is the best I've appl