The GLO-357 trigger with trigger bar is listed by Glock Inc as fitting the GEN3 G17,17L,22,24,31,34,35 pistols.
It features a smooth trigger and is standard issue to these guns however it will also fit the GEN3 G19,23,26,27,32,33.
Also fits Glock models 17RTF and 22RTF
Looking for a GEN4 trigger bar? Glock lists GLO-3608
as the proper part.