WHAT DOES FRT-15L3 MEAN?

I've attempted several diverse forced reset triggers, starting up with rare breeds unique. If the ATF begun knocking on doorways even though, I disassembled it, grinded it up and tossed it within the trash as I did not want any drama from the lawfully acquired trigger. Anyhow, these triggers are magnificent. The FRT-L3 is the best I have made use o