I usually use
I'll bring my trigger pull gauge to the ENS so you can check. I usually use www.Glockparts.com for parts, RSAs, springs, pins, etc. They ship most small items for like $3.00 and they are pretty fast.
I changed my trigger and trigger spring on my G4 19 soon after purchase. Hated the trigger feel and pull.
Reduced the trigger pull (noticeably) but don't have a gauge to test it. Only problem I had was with the trigger housing pin that I had put in incorrectly (has to be put in at the correct depth and I'm an idiot) and it shimmied out during firing.
Made sure no one noticed, fixed and never any more issues. I can't remember the online shop but I think it was Glockmeister
I'll bring my trigger pull gauge to the ENS so you can check. I usually use www.Glockparts.com for parts, RSAs, springs, pins, etc. They ship most small items for like $3.00 and they are pretty fast.