I did a quick search and this looks pretty good...
http://reducerecoil.com/2015/03/difference-between-glock-gen1-glock-gen2-glock-gen3-glock-gen4/

 

I would like to know this as well. i have a gen 3 23 but i'm told that there are "early" and "late" gen 3's. i'd like to know how to tell the difference.

 

From memory...some intra-gen variations:

".357auto" came out during gen2. Early gen2 .40s had shorter frame rails, and Glock did not recommend their use with .357 uppers. At some point, .40s got the longer frame rails Glock decided were a good idea on .357 pistols.

"mid" Gen3 19s and 17s went from being 2-pin to 3-pin frames, gaining the locking block pin. This complicates parts for "Gen3" as there are different locking blocks and slide stops for the 2-pin/3-pin frames.

"late" Gen3s got an updated trigger bar with the newer style geometry where the trigger spring attaches.

Somewhere between Gen2 and Gen3, Glock made G21s that have finger grooves, but no accessory rail.

 

Picture belongs to Glock Talk member
DJ Niner

 

Hey y'all, new to the forum so, thanks for the ad. I purchased my first Glock in '97 I believe...a G23. Having a hard time finding a way to identify which generations my glocks are. I have 4 in total. I know my 32 is a gen4, bit other than that kinda lost. Any help would be awesome. Thanks y'all.

Hello mike7111, welcome to Glock Talk.

The thread at Glock Talk with the most information and useful photographs in one place on this topic is the excellent library created by GT member DJ Niner. The path to the library is given below. If you take time to go through the posts, I think you'll find the answers you seek.

Forums > Glock Talk > Valuable Info > Glock generations, "gills", 2- & 3-pin frames, and other helpful photos

 

Hello mike7111, welcome to Glock Talk.

The thread at Glock Talk with the most information and useful photographs in one place on this topic is the excellent library created by GT member DJ Niner. The path to the library is given below. If you take time to go through the posts, I think you'll find the answers you seek.

Forums > Glock Talk > Valuable Info > Glock generations, "gills", 2- & 3-pin frames, and other helpful photos

 

Thanks GRT45...your help is much appreciated. I'm excited to have found a comprehensive site like this to help me out. It was very kind of you to take a moment and share this with me. Thanks again, bud!

 

From memory...some intra-gen variations:

".357auto" came out during gen2. Early gen2 .40s had shorter frame rails, and Glock did not recommend their use with .357 uppers. At some point, .40s got the longer frame rails Glock decided were a good idea on .357 pistols.

"mid" Gen3 19s and 17s went from being 2-pin to 3-pin frames, gaining the locking block pin. This complicates parts for "Gen3" as there are different locking blocks and slide stops for the 2-pin/3-pin frames.

"late" Gen3s got an updated trigger bar with the newer style geometry where the trigger spring attaches.

Somewhere between Gen2 and Gen3, Glock made G21s that have finger grooves, but no accessory rail.

 

Thanks njl...I appreciate your help with this. I'd like to get my feet wet with some mods, and I was stumped on a few of the correct parts. Y'all are awesome for taking the time to help a newbies gain a little confidence. This is an awesome sire as well. Thanks again, buddy.

 

View attachment 381024
Picture belongs to Glock Talk member
DJ Niner

Pepiot, this is just awesome. Thanks hoss, I can't tell you how much this helps. The few forums I've dabbled with often won't chime in with answers for newbies to the site...Thanks again, bud!

 

Actually, the best way to tell what gen it is is to post a pic of your “gen 1 g23” and then check back in a few minutes for the corrections. [emoji3]

 

Actually, the best way to tell what gen it is is to post a pic of your “gen 1 g23” and then check back in a few minutes for the corrections. [emoji3]

:rofl: