The Zev Technologies Extended Magazine Release, MPN:MR-SM-3G-B, is designed to fit Gen 1-3 Glocks. While the other, MPN:MR-SM-4G, is designed to fit both Gen 4-5 Glocks.
No. the Zev Technologies Extended Magazine Release will not fit any generation of Glock 29. Cross Armory makes a compatible kit that will work for a gen 3 Glock 29. You can find it using the following link:
https://www.opticsplanet.com/cross-armory-glock-gen-1-3-3-piece-kit-3-pin-set.html
The Zev Technologies Extended Magazine Release is only designed for Glocks Gen 1-3 and not Gen 4 Glocks. I would recommend using a dedicated Gen 4 magazine release.
Yes, this will work with a Glock 19 gen4.
Yes it will fit would need MPN: MR-SM-3G-B
No, this will not.
Yes, as long as you choose the Gen 4 model, this will fit a Gen 4 Glock 34.
Yes, as long as you choose the correct generation model.
Yes, as long as you pick the model that fits the proper generation.
Yes, the Gen 3 models will fit a Gen 3 Glock 17.