S-Series

S-Series Magazines · Glock 43X / 48

Fifteen Rounds. Flush.

The S15 holds 15 rounds of 9mm in a steel magazine the same length as the factory 10-rounder. Add an extension when you want 17, 20 or 25.

15 S15 · Flush fit

20 S20 · One piece

25 S15 + 10 extension

Shop S15 Starter Kit Shop S15 Magazine

Runs on our DUAL-FIT steel mag catch. Here's why.

Capacity in a Glock 43X / 48

Grip

15 S15

17 S15 +2

20 S15 +5

20 S20

25 S15 +10

Shaded area is the grip. Illustration; lengths are approximate.

The Original Steel 43X/48 Mag Patented Spring for Life Lifetime Warranty Made in USA

Not Sure Where to Start?

Three Setups That Include the DUAL-FIT

Try It

S15 Starter Kit

15 rounds on board

1× S15 15-round magazine
1× DUAL-FIT mag catch

Shop Starter Kit

Carry Set

S15 Combo Pack 1

15 · 15 · 15 all flush

3× S15 15-round magazines
1× DUAL-FIT mag catch

Shop Combo Pack 1

Full System

Carry + Range

S15 Combo Pack 4

15 · 20 · 20 flush plus two extended

3× S15 15-round magazines
2× S15 +5 extensions
1× DUAL-FIT mag catch

Shop Combo Pack 4

Already running the catch? See all S-Series combos →

We built the first steel-body aftermarket magazine for the Glock 43X and 48. The rest of the industry followed.

Every S-Series mag comes with Spring for Life: free replacement magazine springs for as long as you own it. How it works

One Required Upgrade

Swap to the DUAL-FIT Catch

S-Series magazines are steel and aren't compatible with the factory polymer 43X/48 catch, so they run on our DUAL-FIT steel catch. It also runs Glock's factory 15-round steel mags and comes right‑ or left‑handed. The Starter Kit and Combo Packs 1 and 4 include it.

Shop the DUAL-FIT

What Is the Shield Arms S-Series?

The S-Series is a line of steel-body aftermarket magazines for the Glock 43X and Glock 48. The patented S15 holds 15 rounds of 9mm at the same length as the factory 10-round magazine. The S20 holds 20 in one body, and the S10 is built for grip-chopped frames.

Fits the Glock 43X and 48, all generations
Runs on the Shield Arms DUAL-FIT steel mag catch in place of the factory polymer catch
Extensions take an S15 to 17, 20 or 25 rounds and an S10 to 12 or 15, sold separately or pre-installed
Sold as single magazines, Starter Kits and Combo Packs
Backed by the Shield Arms lifetime warranty and Spring for Life
Designed in Bigfork, Montana, and made in the USA

Questions

S-Series FAQ

Which pistols do S-Series mags fit?

The Glock 43X and 48, all generations. For the single-stack Glock 43, see the Z-Series. For the Glock 19 and 17, see the DS-Series.

Do I have to replace my mag catch?

Yes. The factory polymer catch isn't compatible with S-Series magazines. Install our DUAL-FIT steel catch, or start with the Starter Kit or Combo Pack 1 or 4, which include one.

Can I still run Glock's factory 15-round mags?

Yes. The DUAL-FIT runs S-Series mags and Glock's factory 15-round steel 43X/48 mags on the same catch. Order it right‑ or left‑handed for the hand you shoot with.

S20 or S15 with a +5 extension?

Both hold 20 rounds. The S20 is one piece with nothing to install. The S15 +5 lets you take the extension off and carry the same mag flush at 15.

What is the S10?

A 10-round magazine sized for a grip-chopped 43X or 48. It sits flush in the shortened grip, runs 12 or 15 with an S10 extension, and the same pistol still takes S15 and S20 mags. See the S10 system.

Do grip-chopped pistols come with the catch?

Yes. Pistols from our Grip Chop Service and our S10 custom builds ship with a DUAL-FIT installed.

What is Spring for Life?

Free replacement magazine springs for every Shield Arms magazine, for as long as you own it. See the program.

What's covered by the warranty?

Every S-Series magazine and extension is covered for life against defects in materials and workmanship. See the warranty.

S-Series Mag Catches

S-Series Magazines

S-Series Combos

S-Series Extensions

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S15 Combo Pack 1 for Glock 43X / 48

A full Glock® 43X / 48 carry setup: three S15 Gen 3 15-round steel magazines and a DUAL-FIT black nitride steel mag catch. 45 rounds, all flush. Made in the USA.

$121.95

Shield Arms S15 Gen 3 - 15 Round Glock 43X/48 Magazine

S15 Gen 3 15-Round Steel Magazine for Glock 43X / 48

The original steel 15-round magazine for the Glock 43X and 48. The patented S15 fits 15 rounds flush in the grip, with nothing hanging below it. Extends to 17, 20 or 25 rounds. Requires a Shield Arms steel mag catch. Made in USA, with a lifetime warranty and Spring for Life.

$39.95

S20 - 20 Round Glock 43X/48 Magazine

The Shield Arms S20 is a patented 20-round steel magazine for Glock 43X/48 — the highest-capacity backup mag available for the platform. Built on the S15's staggered feed geometry in a single steel body. QPQ finish, Made in USA, lifetime warranty.

$44.95 $39.95

S10 Magazine - 10 Round Magazine for Glock® 43X / 48

S10 Magazine for Modified Glock 43X / 48

Patented 10-round steel magazine that sits flush in a Shield Arms grip-chopped Glock® 43X or 48. Extends to 12 or 15 rounds with S10 extensions. Requires a steel mag catch. Made in the USA.

$35.95

S15 Combo Pack 2 for Glock 43X / 48

Three S15 Gen 3 15-round magazines and an S15 +5 extension for the Glock 43X/48: carry two flush and run the third at 20.

$149.95

S10 +2 Pre-Installed Magazine Extension

A Shield Arms S10 magazine with the +2 extension pre-installed: 12 rounds, ready to load. For Shield grip-chopped Glock® 43X and 48 pistols. Requires a steel mag catch. Made in the USA.

$68.95

S15 Combo Pack 3 for Glock 43X / 48

Three S15 Gen 3 15-round magazines and two S15 +5 extensions for the Glock 43X/48: carry one flush and run two at 20.

$179.95

Shield Arms S10 +2 Extension

Adds 2 rounds to the Shield Arms S10 magazine, taking it from 10 to 12. Billet 6061 aluminum with an easy-access floor plate for cleaning without removing the extension. Made in the USA.

$39.95

S10 +5 Pre-Installed Magazine Extension

A Shield Arms S10 magazine with the +5 extension pre-installed: 15 rounds, ready to load. For Shield grip-chopped Glock® 43X and 48 pistols. Requires a steel mag catch. Made in the USA.

$68.95

S15 Combo Pack 4 for Glock 43X / 48

Three S15 Gen 3 15-round magazines, two S15 +5 extensions and the DUAL-FIT steel mag catch for the Glock 43X and 48. Carry one flush at 15 and run two 20-round reloads; catch is right- or left-handed.

$199.95

Shield Arms S10 +5 Extension

Adds 5 rounds to the Shield Arms S10 magazine, taking it from 10 to 15. Billet 6061 aluminum with an easy-access floor plate for cleaning without removing the extension. Made in the USA.

$39.95

Shield Arms S15 +10 Magazine Extension - Black

S15 +10 Magazine Extension for Glock 43X / 48

Takes a Shield Arms S15 magazine from 15 to 25 rounds in the Glock 43X/48. Billet 6061 aluminum with a 15-coil power spring and easy-access floor plate.

$39.95

S15 +10 Pre-installed Magazine Extension

Shield Arms +10 mag extension for the S15 magazine.

$74.95

S15 Combo Pack 5 for Glock 43X / 48 – 5 Magazines

Five S15 Gen 3 15-round steel magazines for the Glock® 43X and 48, in black Nitrocarb. 75 rounds, all flush. Requires a Shield Arms steel mag catch, sold separately.

$189.95

Shield Arms S15 +2 Magazine Extension - Black

S15 +2 Magazine Extension for Glock 43X / 48

A billet aluminum +2 extension that takes a Shield Arms S15 magazine from 15 to 17 rounds in the Glock 43X/48. The 11-coil plus-power spring is included.

$34.95

S15 +2 Pre-Installed Magazine Extension

Save time with our factory pre-installed S15 +2 Magazine Extension featuring 17+1 capacity for Glock 43X/48. Precision-machined aluminum construction with lifetime warranty and Spring for Life guarantee.

$68.95

S15 Combo Pack 6 for Glock 43X / 48 – 10 S15 Gen 3 Magazines

Ten S15 Gen 3 15-round steel magazines for the Glock® 43X and 48, in black Nitrocarb. 150 rounds, all flush. Requires a Shield Arms steel mag catch, sold separately.

$294.95 $249.95

Shield Arms S15 +5 Magazine Extension - Black

S15 +5 Magazine Extension for Glock 43X / 48

A billet aluminum +5 extension that takes a Shield Arms S15 magazine from 15 to 20 rounds in the Glock 43X/48. The 12-coil power spring is included. Your S15 runs on a Shield Arms steel mag catch.

$39.95

S15 +5 Pre-Installed Magazine Extension - Black

S15 +5 Pre-Installed 20-Round Magazine for Glock 43X / 48

Our patented S15 Gen 3 magazine with the +5 extension and a 12-coil power spring pre-installed. Holds 20 rounds of 9mm in the Glock 43X and 48 and arrives ready to load. Remove the extension and swap the spring to carry it flush at 15. Requires a Shield Arms steel mag catch. Made in USA.

$74.95

S15 Combo Pack 7 for Glock 43X / 48

Three S15 Gen 3 15-round steel magazines plus one +5 and one +2 extension for the Glock® 43X and 48. Run 15, 17 and 20. Requires a Shield Arms steel mag catch, sold separately.

$184.95

S15 Combo Pack 8 for Glock 43X / 48

Three S15 Gen 3 magazines with S15 +5 extensions pre-installed, plus the DUAL-FIT steel mag catch, for the Glock 43X and 48. 20 rounds each, ready to load; catch is right- or left-handed.

$199.95

S15 Combo Pack 9 for Glock 43X / 48

Three S15 Gen 3 magazines with S15 +2 extensions pre-installed, plus the DUAL-FIT steel mag catch, for the Glock 43X and 48. 17 rounds each with minimal added length; catch is right- or left-handed.

$194.95

Premium S15 Steel Mag Catch for Glock 43X/48

Premium hand-specific steel mag catch for Shield Arms S15 magazines. Enhanced ergonomics with extended knurling, beveled edges for smooth reloads, and increased magazine engagement. Not compatible with OEM magazines. Select left or right hand. Made in USA, lifetime warranty.

$36.95

S15 Magazine GEN 3 With Grip Chop Sleeve

Our patented 15-round S15 Gen 3 steel magazine, packaged with a Grip Chop Sleeve for a better grip on Shield Arms grip-chopped Glock® 43X and 48 pistols. Requires a steel mag catch. Made in the USA.

$49.95

S15 Magazine Grip Chop Sleeve

Slides onto a Shield Arms S15 magazine to restore full grip length in an S10 grip-chopped Glock® 43X or 48. Designed for Gen 3 S15s and works with S15 +2, +5 and +10 magazines. Made in the USA.

$8.95

S15 Magwell Combo 1 for Glock 43X / 48

The complete Glock® 43X / 48 upgrade: three S15 Gen 3 15-round steel magazines, a DUAL-FIT black nitride steel mag catch, and a black Carry Magwell. Made in the USA.

$188.95

S15 Magwell Combo 2 for Glock 43X / 48

Three S15 Gen 3 15-round steel magazines, one S15 +5 extension, one DUAL-FIT black nitride steel mag catch, and a black Carry Magwell for the Glock® 43X / 48. Carry 15, reload with 20. Made in the USA.

$224.95

S15 Magwell Combo 3 for Glock 43X / 48

Three S15 Gen 3 15-round steel magazines, one S15 +2 extension, one DUAL-FIT black nitride steel mag catch, and a black Carry Magwell for the Glock® 43X / 48. 17 rounds with only a little added length. Made in the USA.

$220.95

S15 Starter Kit for Glock 43X / 48

Everything you need to run an S15 in your Glock 43X or 48: one S15 Gen 3 15-round steel magazine and a DUAL-FIT black nitride steel mag catch. Made in the USA.

$44.95

DUAL-FIT Mag Catch for Glock 43X / 48

Steel mag catch for the Glock 43X and 48 that runs Shield Arms S-Series magazines and Glock’s factory 15-round steel magazines on one catch. Black nitride, made in the USA. Pick the hand you shoot with. Right-handed puts the button on the left side of the frame, under your right thumb, like a factory 43X/48. Left-handed puts it on the right side. SPECIAL LAUNCH PRICE!

$19.95 $14.95

[S15-ALU-BAS-BLK] S15 +0 Aluminum Base Plate (Black)

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S-Series

S-Series Magazines · Glock 43X / 48

Three Setups That Include the DUAL-FIT

S15 Starter Kit

S15 Combo Pack 1

S15 Combo Pack 4

Swap to the DUAL-FIT Catch

What Is the Shield Arms S-Series?

S-Series FAQ

Which pistols do S-Series mags fit?

Do I have to replace my mag catch?

Can I still run Glock's factory 15-round mags?

S20 or S15 with a +5 extension?

What is the S10?

Do grip-chopped pistols come with the catch?

What is Spring for Life?

What's covered by the warranty?

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