CMC Triggers has been selling very nice, drop-in AR-15 triggers for many years. Just last year they branched out into AK-47 triggers and, in what was certainly a surprise to me, this year at SHOT Show they were showing off a replacement GLOCK trigger. It still sports the unique CMC flat trigger face with hooked bottom.
As you can see in the video of its reset and break, it’s very obviously crisper than a factory GLOCK trigger but hasn’t quite removed all remnants of the sponginess and creep. It’s smoother, too, and it looks and feels good.