Just replaced my stock glock trigger on my Gen 4 19 and love it. Hated the serrated stock trigger from glock and replaced it with a smooth trigger GLSSP00357 and it's great. What a difference. Reduced pull and huge difference in feel. Found a great vid on youtube HeyYoMikey81 who has a step by step installation if you need it. Some like the Stock glock trigger, and I thought I did till now, but this was such a great improvement at a very low cost ($22.00 including tax and shipping).
Just my opinion but this might be of use to some and I though I would post.
Just my opinion but this might be of use to some and I though I would post.