Magazines are the most common source of stoppages in any semi-automatic pistol, which makes them the part least worth economising on. A Glock magazine is a steel-lined polymer body with a follower, spring and floor plate, and the body profile is what determines what it will fit.
How fitment works
Compatibility runs on calibre and frame size, then generation. Larger-frame guns will generally accept magazines from smaller guns in the same calibre — a G17 magazine runs in a G19 — but not the reverse, since the shorter body will not reach the catch. Gen 5 magazines changed the body and follower, and the slim guns (43, 43X, 48) share nothing with the double-stack line.
Fitment chart
| Glock model & generation | Part | Notes |
|---|---|---|
| Glock 17 Gen 3 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 17 Gen 4 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 17 Gen 5 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 19 Gen 3 | Glock OEM 9mm 10 Round Magazine for Glock 19 Gen 1-5 | Direct fit — verified for this model and generation. |
| Glock 19 Gen 4 | Glock OEM 9mm 10 Round Magazine for Glock 19 Gen 1-5 | Direct fit — verified for this model and generation. |
| Glock 19 Gen 5 | Glock OEM 9mm 10 Round Magazine for Glock 19 Gen 1-5 | Direct fit — verified for this model and generation. |
| Glock 19X Gen 3 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 19X Gen 4 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 19X Gen 5 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 21 Gen 3 | Glock OEM .45 10 Round Magazine 10021 for Glock 21 GEN 1-4 | Direct fit — verified for this model and generation. |
| Glock 21 Gen 4 | Glock OEM .45 10 Round Magazine 10021 for Glock 21 GEN 1-4 | Direct fit — verified for this model and generation. |
| Glock 22 Gen 3 | Glock OEM Magazine 10 Round .40 S&W for Glock 22 35 | Direct fit — verified for this model and generation. |
| Glock 22 Gen 4 | Glock OEM Magazine 10 Round .40 S&W for Glock 22 35 | Direct fit — verified for this model and generation. |
| Glock 23 Gen 3 | Glock OEM Magazine 10 Round .40S&W for Glock 23 Gen 1-4 | Direct fit — verified for this model and generation. |
| Glock 23 Gen 4 | Glock OEM Magazine 10 Round .40S&W for Glock 23 Gen 1-4 | Direct fit — verified for this model and generation. |
| Glock 26 Gen 3 | Glock OEM Magazine for Glock 26 10 Round 9MM Gen 1-4 | Direct fit — verified for this model and generation. |
| Glock 26 Gen 4 | Glock OEM Magazine for Glock 26 10 Round 9MM Gen 1-4 | Direct fit — verified for this model and generation. |
| Glock 26 Gen 5 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 34 Gen 3 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 34 Gen 4 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 34 Gen 5 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 42 All | Glock OEM Magazine 42006 6 Round .380 for Glock 42 | Direct fit — verified for this model and generation. |
| Glock 43 All | ETS Glock 43 Magazine 9 round 9mm – Upgrade | Direct fit — verified for this model and generation. |
| Glock 43X All | Glock OEM Magazine for 43X 48 10 Round 9mm | Direct fit — verified for this model and generation. |
| Glock 45 Gen 3 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 45 Gen 4 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 45 Gen 5 | ETS 10 Round Magazine 9mm For Glock 17 18 19 19X 26 34 45 | Direct fit — verified for this model and generation. |
| Glock 48 All | Glock OEM Magazine for 43X 48 10 Round 9mm | Direct fit — verified for this model and generation. |
Choosing and fitting
Buy OEM or a well-established aftermarket brand for anything you carry, and keep range-only magazines visually marked so they never end up in a defensive gun. Number your magazines: when a stoppage happens, knowing which magazine it came from is the difference between finding the fault and guessing at it.