I know I'm missing the new ones, but:
17, 9mm Luger, 17 round capacity, 7.32” slide length
19, 9mm Luger, 15 round capacity, 6.85” slide length
20, 10mm, 15 round capacity, 7.59” slide length
21, 45 ACP, 13 round capacity, 7.59” slide length
22, 40 S&W, 15 round capacity, 7.32” slide length
23, 40 S&W, 13 round capacity, 6.85” slide length
25, 380 ACP, 15 round capacity, 6.85” slide length
26, 9mm Luger, 10 round capacity, 6.29” slide length
27, 40 S&W, 9 round capacity, 6.29” slide length
28, 380 ACP, 10 round capacity, 6.29” slide length
29, 10mm, 10 round capacity, 6.77” slide length
30, 45 ACP, 10 round capacity, 6.77” slide length
31, 357 Sig, 15 round capacity, 7.32” slide length
32, 357 Sig, 13 round capacity, 6.85” slide length
33, 357 Sig, 9 round capacity, 6.29” slide length
34, 9mm Luger, 17 round capacity, 8.15” slide length
35, 40 S&W, 15 round capacity, 8.15” slide length
I heard somewhere that the numbers correspond to when the model is introduced/patented/registered/??? something.
I have found Glocks to be extremely durable and reliable. On the other hand, my wife has problems with her hands, and she cannot hold a Glock tight enough for it to cycle, yet a 1911 will cycle if she's firing with her weak grip. I could never get used to the Glock's trigger -- but I've spent years with single-action autos and single-action revolvers. I like 45 ACP but found the Glock 30 was kind of like carrying a brick.
Having said all that, I would feel quite comfortable carrying a Glock 19 as my primary. Since I have a choice, I stay with the 1911s. My wife went to two S&W 640s........ everybody's different.