More Capacity. More Capability. The New Warne® +5 Magazine Extension for Glock® 43X/48 15 Round Steel Magazine.

October 8, 2026

More Capacity. More Capability. The New Warne® +5 Magazine Extension for Glock® 43X/48 15 Round Steel Magazine.

Small doesn’t have to mean limited in capability. The Glock 43X and 48 have become popular choices for shooters looking for a slim, compact, easy-to-carry pistol, and the introduction of new 15-round steel magazines significantly expands what these pistols can offer. Now, the new Warne +5 Magazine Extension takes that capability even further.

Designed specifically for the new 15-round steel Glock magazines, the Warne +5 extension adds five additional rounds, bringing total magazine capacity to 20 rounds while providing a durable, ergonomic upgrade designed for dependable performance.

Warne 3138 Magazine Extension for Glock 43X

Five More Rounds. Greater Capability

The combination of a compact Glock 43X or 48, a 15-round steel magazine, and the Warne +5 Magazine Extension creates a significant increase in capability without changing the compact nature of the pistol itself. Adding five rounds means more capacity between reloads and gives shooters greater flexibility whether they're training at the range or configuring their pistol for everyday use.

If keeping the firearm as compact as possible in the holster for concealed carry is your goal, the standard magazine, or 15 round steel magazine are a great option. In that case, the Warne +5 magazine extensions are great accessories to add capacity to backup or spare magazines. The ability to reload with a higher capacity magazine can be a great advantage when the firearm is in use while maintaining a compact overall size while using a holster.

Warne 3138 Glock 43X magazine extension

Built from Aluminum for Long-Term Durability

The Warne +5 Magazine Extension is constructed from aluminum to provide the strength and durability needed for demanding use while maintaining a streamlined profile. Each extension includes a new spring and a secure retention system designed to keep the extension firmly in place and provide reliable, long-term performance.

Warne 3138 +5 magazine extension for Glock 43X

Designed for Positive Handling

The ergonomic shape of the Warne +5 provides a comfortable, positive interface when inserting and removing the magazine. Integrated finger grooves also provide a secure point for gripping the magazine, making magazine stripping quick and intuitive when needed.

The extension adds useful functionality while maintaining a clean, purpose-built appearance that complements the compact Glock platform.

Warne 3138 mag extension for Glock 43X

Built the Warne Way

At Warne, we believe accessories should do more than simply add features—they should solve problems and perform when you need them. The new +5 Magazine Extension combines durable aluminum construction, a new spring, secure retention, and thoughtful ergonomics into one purpose-built upgrade.

For Glock 43X and 48 owners using the new 15-round steel magazines, the Warne +5 Magazine Extension offers a straightforward way to get more from a compact platform.