GLOCK’s OEM 15-Round Magazines: What G43X, G48 and G44 Owners Need to Know
GLOCK’s OEM 15-round magazines for the G43X, G48 and G44 are one of the company’s more notable Slimline accessory updates of 2026. Announced April 17 at the 2026 NRA Annual Meetings & Exhibits, the new magazines give G43X and G48 owners a factory 15-round option while allowing them to retain the standard magazine catch. GLOCK also announced a 15-round magazine for the G44 .22 LR pistol.
The change is significant because the G43X and G48 previously shipped around a 10-round Slimline magazine platform. GLOCK’s new design increases capacity without requiring owners to replace the pistol’s standard magazine catch.
GLOCK OEM 15-Round Magazine Overview
GLOCK’s new magazines cover three different pistols:
| Pistol | Caliber | New Magazine | Construction |
|---|---|---|---|
| G43X | 9mm Luger | 15 rounds | Metal double-stack |
| G48 | 9mm Luger | 15 rounds | Metal double-stack |
| G44 | .22 LR | 15 rounds | Polymer double-stack |
GLOCK specifically identifies the G43X and G48 magazines as 15-round Slimline magazines using a metal double-stack construction. The magazine’s catch recess is designed with a radius that allows owners to continue using the standard magazine catch.
The G44 uses a separate 15-round magazine design made from polymer with an integrated loading aid.
GLOCK G43X and G48 Get 15-Round OEM Magazines
The most anticipated part of the announcement is the new GLOCK G43X 15-round magazine and GLOCK G48 15-round magazine.
Both pistols were originally introduced with 10-round Slimline magazines. GLOCK’s 2020 announcement for the optic-ready G43X and G48 models confirms the original 10-round configuration.
The new 15-round magazine adds five rounds while maintaining the Slimline magazine concept.
For existing owners, the most important detail is that GLOCK says the magazine’s design allows users to retain the standard magazine catch.
That differentiates the OEM magazine from the aftermarket solutions that have historically been available for increasing G43X and G48 capacity.
What Changed From the 10-Round Magazine?
The capacity increase comes from the magazine’s metal double-stack construction.
GLOCK says the 15-round Slimline magazine maintains compatibility with the standard magazine catch through a redesigned catch recess.
The result is a higher-capacity magazine designed specifically around the dimensions and operating requirements of the G43X and G48.
Because the magazine is longer than the original 10-round version, some additional magazine protrusion below the grip is an expected consequence of the greater capacity.
Does the G43X Need a New Magazine Catch?
According to GLOCK, no.
This is one of the most important points in the announcement. The new 15-round Slimline magazine’s catch recess was specifically designed so G43X and G48 owners can continue using the standard magazine catch.
That makes the new magazine a particularly straightforward factory upgrade for existing owners.
GLOCK G44 Gets a 15-Round Magazine
The GLOCK 44 receives a different 15-round magazine design.
The G44 is chambered in .22 LR, rather than the 9mm Luger used by the G43X and G48. GLOCK says its new G44 15-round magazine uses a polymer double-stack construction with integrated loading assistance.
This is particularly relevant for range shooters who use the G44 as a rimfire training platform.
More capacity means fewer magazine changes during extended practice sessions, while the loading aid addresses one of the practical inconveniences of filling small rimfire magazines.
Why the OEM Design Matters
The biggest story isn’t simply five additional rounds.
It’s that GLOCK itself is now offering the capacity increase as an OEM magazine.
The G43X and G48 have historically attracted aftermarket magazine products designed to increase capacity beyond the factory 10-round configuration.
Those products vary in construction, compatibility, and reliability.
The new GLOCK magazines give owners a factory-developed alternative.
That does not automatically make every aftermarket magazine inferior, but it gives buyers another choice from the original manufacturer.
G43X vs. G48: Does the Magazine Work in Both?
Yes. GLOCK specifically announced the 15-round Slimline magazine for both the G43X and G48.
This is useful for owners who have both models because the magazine platform can be shared between the two compatible 9mm Slimline pistols.
The firearms themselves have different slide and barrel configurations, but the new 15-round magazine is designed for the G43X and G48 Slimline models.
G44 15-Round Magazine vs. G43X/G48 Magazine
The G44 magazine should not be confused with the G43X/G48 9mm magazine.
The G43X and G48 use the new metal 15-round 9mm Slimline magazine.
The G44 uses a polymer 15-round .22 LR magazine with integrated loading assistance.
The pistols use entirely different cartridges and magazine systems, so the magazines are not interchangeable.
Why the G44 Magazine Matters for Training
The G44 occupies a different role from the G43X and G48 because it is a .22 LR rimfire pistol.
GLOCK describes the G44 as a training-oriented rimfire platform, and its magazine technology has historically focused on keeping the lightweight .22 LR pistol reliable while making loading easier. GLOCK’s current magazine information lists the G44’s original polymer magazine with loading assistance.
The new 15-round version extends that concept.
For high-volume range sessions, five additional rounds per magazine can reduce interruptions without requiring a much larger pistol or a separate magazine ecosystem.
Availability
GLOCK originally announced the new magazines with dealer availability expected in May 2026.
Because that date has now passed, current availability should be checked directly with GLOCK dealers rather than relying on the original announcement’s future-tense language.
As with any newly introduced magazine, inventory can vary by distributor and region.
GLOCK’s Broader 2026 Product Changes
The magazine announcement came during a larger year of changes for GLOCK.
The company also introduced its Gen6 pistol family in 2026, with updated grip geometry, frame ergonomics, and integrated optic-ready configurations.
At the same time, GLOCK’s 2026 portfolio includes changes to its existing lineup, including scheduled discontinuations of selected Gen5 models.
That makes 2026 an unusually active year for the company, and the new Slimline and G44 magazines fit into that broader product refresh.
Frequently Asked Questions
Does the GLOCK G43X have a 15-round magazine?
Yes. GLOCK announced a 15-round OEM magazine for the G43X in April 2026. The magazine uses a metal double-stack design and is designed to retain the standard magazine catch.
Does the GLOCK G48 use the same 15-round magazine as the G43X?
Yes. GLOCK designed the new 15-round Slimline magazine for both the G43X and G48.
Does the G44 have a 15-round magazine?
Yes. GLOCK announced a 15-round OEM magazine for the G44, which uses a polymer double-stack design with integrated loading assistance.
Do I need to change the magazine catch for the G43X 15-round OEM magazine?
GLOCK says the new 15-round Slimline magazine is designed to work with the standard magazine catch, so no magazine-catch replacement is required for the stated compatibility.
When did GLOCK announce the 15-round magazines?
GLOCK officially announced the G43X, G48, and G44 15-round OEM magazines on April 17, 2026, during the NRA Annual Meetings & Exhibits.
Are the G43X, G48 and G44 15-round magazines the same?
No. The G43X and G48 share a 9mm Slimline magazine design, while the G44 uses a separate .22 LR polymer magazine.
What did the G43X and G48 originally come with?
The original Slimline G43X and G48 configurations used 10-round magazines. GLOCK confirmed the 10-round capacity in its 2020 announcement of the optic-ready Slimline models.
Bottom Line
The GLOCK OEM 15-round magazines for the G43X and G48 are an important update because they address one of the most obvious limitations of the original Slimline configuration without requiring owners to replace the standard magazine catch.
The G44 gets its own 15-round polymer magazine, giving the .22 LR trainer a capacity increase and integrated loading assistance.
For G43X and G48 owners, the biggest change is the availability of a factory 15-round option. For G44 owners, the update makes an already useful rimfire training platform more convenient for extended range sessions.
The announcement also illustrates a broader trend within GLOCK’s 2026 lineup: updating established platforms around capacity, ergonomics, and modern shooting requirements while retaining the basic dimensions and operating characteristics that made the models popular in the first place.