Chuckman
Senior Member
You can cut a 17 frame to 19 size and 19 frame to 26 size with less than a days worth of effort. You can also buy a lot of full size glocks at bargain prices these days.
Mag sleeves to upsize guns is kind of goofy in my opinion. The resulting grip shape is usually not good and they tend to pinch.
This is what I do with my 17s: my own grip reduction to G19 size. Concealability of the 19 and shootability of the 17.