I installed a Ghost 3.5 connector ( drop in/ polished, no fitting needed ) ) in my G32 which currently has a LW 9mm conversion barrel. The Glock now shoots three round bursts. Reinstall original Glock connector and gun shoots as it should.
Checked engagement of trigger bar and firing pin lug of both connectors and the engagement seems to be the same by checking under the orange slide cover plate.
Anyone heard of the connector having this type of effect??
Ghost's website has a helpful FAQ that should solve that. I'm mobile so not going to be digging around for it, but if you can't find it let me know and I'll dig around when I get home.