Mix & Match Glock

[LittleChickie]

I have installed a 9mm barrel in lieu of the .40 cal barrel in my Model 23 Glock using a LoneWolf replacement. I also have a Model 26 (stock) and a Model 27 that has Trijicon night sights. I'm wondering just how much interchangability there is with these guns; can I use the slide from the .40 M27 on the M26 to take advantage of the night sights? I already have a 9mm barrel for the M27 but am just wondering.......

[HighLander51]

G17/G34/G17L/G22/G35/G24/G31 use the same frame and interchange uppers

G19/G23/G32

G26/G27/G33

G30/G29

G20/G21

None of these frame groups interchange with any other frame group uppers