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[Eroland7]

I was thinking about putting up my glock for sale. All other glocks i've seen for sale either say 2nd or 3rd generation. How do i know which mine is, since im sure someone will ask? I bought it about 7 years ago new. Its a Glock 23.

[69Mach1]

What are the different frame styles or 'generations'?
The Glock frame has evolved through 3 styles known as generations. There are quite a few sub-generations, limited runs and experimental frames but these are the major breakdowns:
1st generation smooth grip no finger grooves no rails
2nd generation textured grip no finger grooves no rails
3rd generation textured grip finger grooves accessory rails*
*accessory rails are not available on the subcompact Glocks

Here's an EXCELLENT picture contributed by Butch Barton that shows all three frames together:

Here.

http://www.glockfaq.com/gunsmithing.htm

[Eroland7]

Sweet, simple, THANKS!

[69Mach1]

No problem.
I maybe wrong, but the only models that were 1st gen were the Glock 17 (L) and Glock 22.