WHAT DOES FRT-15L3 MEAN?

I have attempted quite a few diverse forced reset triggers, starting off with rare breeds initial. Once the ATF started knocking on doorways although, I disassembled it, grinded it up and tossed it within the trash as I failed to need to have any drama from the legally bought trigger. Anyhow, these triggers are brilliant. The FRT-L3 is the greatest