Please email us at techsales@opticsplanet.com so we can further answer your question.
Technically this should work on a properly completed Polymer80 frame, however the manufacturer will only guarantee function on a factory Glock frame.
The Advantage Arms Glock 26/27 .22 LR Conversion Kit will not work with a Gen 5 Glock 26/27.
The manufacturer does not recommend a specific type of oil to use with the Advantage Arms Glock 26/27 .22 LR Conversion Kit. The gun oil at the link below will work.
https://www.opticsplanet.com/lucas-oil-gun-oil-2oz.html
You can find the Advantage Arms Glock, 26, 27 22LR 10-Round Magazine compatible with this kit by using the link below:
https://www.opticsplanet.com/advantage-arms-glock-26-27-22lr-10-round-magazine.html
No, that would not work. The manufacturer specifically states that the Advantage Arms Glock 26/27 .22 LR Conversion Kits are only compatible with the Glock Models and Generations they are specified for use with.
No, it will not, it is for Gen 1-3.
No, it will not work on a Gen 5.
This is for the Gen 3
I would assume it is to adjust the rear sight.