Glock internal parts compatibility?

[cc-hangfire]

I’ve searched old threads, & while there are plenty discussing slide swap compatibility, my question goes a little deeper. And my questions only concern Gen3 (& Gen2) 9mm handguns.

Which internal parts of the slide are interchangeable between models 17, 19, & 26?

And which internal parts of the lower are interchangeable between models 17, 19, & 26?

I’m not a Glock armorer but the guns are so elegantly and simply designed that they are just a few steps above LEGO’s. I ordered parts for a 17 slide, and installed them on a 19 slide — no problem. I know, too, that a19 slide will operate on a 26 frame/lower so the interface dimensions are the same there. I know the locking blocks are slightly different shapes and locations(G17 at least). Do the rest interchange?

 

[FL-NC]

I think its all the same.

 

[1KPerDay]

Locking blocks and barrels no, everything else yes. Some have smooth triggers, some serrated. But they interchange assuming same caliber.

 

[cc-hangfire]

That’s what I thought, but wanted confirmation before I did any mix & match.

Ah, the genius of Gaston Glock (or the result of a savvy industrial manufacturer simplifying production as much as possible in handgun design).

 

[tarosean]

Do the rest interchange?

you have a lot of different Generations to contend with.
1-3 are pretty much interchangeable (except for the pin count). You start getting real sketchy beyond that.