Zev does not provide a specific pull weight, however they say it provides a 15% reduction in trigger pull weight from a stock Glock trigger.
Yes, it will.
The ZEV Technologies PRO Flat Face Gen5 Glock Trigger Bar Upgrade Kit will be compatible with your Glock 19 Gen 5. As far as options go, ZEV is a very well know manufacturer that makes high quality parts. This is a great option to obtain a smooth and crisp trigger pull. No other parts would be necessary for installation.
The ZEV Technologies PRO Flat Face Gen5 Glock Trigger Bar Upgrade Kit is not compatible with the Glock 44. We do carry the Timney Triggers Glock Alpha Competition Trigger for the Glock 44, which can be found by using the link below:
https://www.opticsplanet.com/timney-triggers-alpha-competition-trigger.html?_iv_gun-model=glock-44
The ZEV Technologies PRO Flat Face Gen5 Glock Trigger is specifically designed for Gen 5 Glocks in 9mm and .40 S&W, and is not compatible with the Gen 4 Glock 21. I would recommend using the Agency Arms Drop-In Trigger, found by using the link below:
https://www.opticsplanet.com/agency-arms-dit-45-b-drop-in-trigger-glock-45acp-10mm-aluminum-black-3-5lbs.html?_iv_gun-model=glock-21-dot-45-acp
Yes, this ZEV Technologies PRO Flat Face Gen5 Glock Trigger Bar Upgrade Kit is compatible with the Gen 5 Glock 19.
Yes, the ZEV Technologies PRO Flat Face Gen5 Glock Trigger Bar Upgrade Kit will fit and function as intended in a Gen 5 Glock 23.
Yes, this trigger should fit that pistol.
No, it unfortunately will not.
Unfortunately, not. There is a change to the fit of the trigger bar in its travel along the inside of the grip. As the Gen 5 models have different dimensions, the parts do not fit properly.