Glock frame interchangability?

[cstarr3]

Does anybody know if the frames of the Glock 20 and 21 are the same, i.e. if you take the slide assembly, recoil spring and barrel off of a Glock 21, could you throw on a Glock 20 slide assembly, recoil spring and barrel?

For those curious to know why: I am a bit of a caliber whore. I figured that with proper slide, barrel, and recoil spring replacements, a full size Glock frame (either 20 or 21) can shoot seven or eight different calibers: .45 ACP/Super, .40 Super, .400 Corbon, 10mm, 9x25 Dillon, .40 S&W and .357 Sig... Maybe even the .45 GAP, if I were so inclined. I know this setup would be a bit of a novelty, but I am still in the "is it even possible" phase.

[Oceanbob]

Does anybody know if the frames of the Glock 20 and 21 are the same, i.e. if you take the slide assembly, recoil spring and barrel off of a Glock 21, could you throw on a Glock 20 slide assembly, recoil spring and barrel?

For those curious to know why: I am a bit of a caliber whore. I figured that with proper slide, barrel, and recoil spring replacements, a full size Glock frame (either 20 or 21) can shoot seven or eight different calibers: .45 ACP/Super, .40 Super, .400 Corbon, 10mm, 9x25 Dillon, .40 S&W and .357 Sig... Maybe even the .45 GAP, if I were so inclined. I know this setup would be a bit of a novelty, but I am still in the "is it even possible" phase.

Exactly the same.

[Quiet]

Glock 17, 17L, 22, 24, 31, 34, 35, 37 = same frame
Glock 19, 23, 25, 32, 38 = same frame
Glock 26, 27, 28, 33, 39 = same frame
Glock 20, 21 = same frame
Glock 29, 30 = same frame

[HighLander51]

Search

http://www.calguns.net/calgunforum/showthread.php?t=593816

[CK_32]

Glock 17, 17L, 22, 24, 31, 34, 35, 37 = same frame
Glock 19, 23, 25, 32, 38 = same frame
Glock 26, 27, 28, 33, 39 = same frame
Glock 20, 21 = same frame
Glock 29, 30 = same frame

I don't believe that list works with the gen4s tho.. Heard they have fitting problems with older models frame/slide if swapped.

[Tripper]

Glock 17, 17L, 22, 24, 31, 34, 35, 37 = same frame
Glock 19, 23, 25, 32, 38 = same frame
Glock 26, 27, 28, 33, 39 = same frame
Glock 20, 21 = same frame
Glock 29, 30 = same frame

dont forget 29SF/30SF

oh, i think the extractor might need changing between some of the calibers

[G-forceJunkie]

The ejector should be changed a well depending on what you plan to shoot.

[cstarr3]

Thank you all for your input. Good to know.

As far as the ejector, I think that all of these calibers are based on the exterior dimensions of one of two parents, the 10mm (for .40 S&W, .357 Sig, and 9x25 Dillon) or .45 ACP (for .45 Super, .400 Corbon, .40 Super). The .45 GAP is the odd-ball, and the whole purpose of the GAP was to get .45 ACP performance out of a cartridge short enough to fit into a smaller frame, so shooting in in a larger frame seems to miss the whole point of the cartridge. I figured having a slide for both the 20 and 21 would do, and I could just drop in the barrels of the proper cartridge.

Again, thanks for the info.

[G-forceJunkie]

Right, but the two parent cartrage sizes(.45 and the 10mm) have different ejectors due to the difference in case diameter.

[Tripper]

cool

[CK_32]

Doesn't get any sexier than that!!

That's not even wih the 34 (or what ever # the 17L is)

[Shapes And Colors]

Doesn't get any sexier than that!!

That's not even wih the 34 (or what ever # the 17L is)

The 17L is the 17L.
The 34 is the 9mm with a 5.32" barrel.

[SouperMan]

cool

Really cool!

[datsunrdster67]

Black Talons? have more?

[Plisk]

With the Large Frame Glocks, (.45 & 10mm) they share the same frame size and ejector. The lower ends will swap over 100%. Slides and barrels are specific to each other, you can't get away with caliber swaps like you can with the 9mm & .40 slides and barrels.