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.
SKU: SA-S15
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Availability: In stock
$39.99
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Buy now, pay later Available at checkout on orders over $150
Compatibility

Fits the Glock® 43X and 48. Runs With a Steel Mag Catch.

The S15 fits the Glock® 43X and 48, all generations. It's a steel magazine, and the polymer mag catch the pistol ships with isn't compatible with it, so install our Standard or Premium steel catch. The S15 Starter Kit includes one. Running a single-stack Glock® 43? See the Z-Series.

What Is the Shield Arms S15 Gen 3?

The S15 is a patented 15-round steel magazine for the Glock® 43X and 48. It fits 15 rounds flush in the 43X/48 grip, with nothing hanging below it, so the pistol carries the same. It was the first steel-body aftermarket magazine for the 43X and 48. It runs with a Shield Arms steel mag catch, takes our +2, +5 and +10 extensions, and is made in the USA with a lifetime warranty and Spring for Life.

  • Capacity: 15 rounds of 9mm, flush
  • Fits: Glock® 43X and 48, all generations
  • Requires: a Shield Arms steel mag catch
  • Extends to: 17, 20 or 25 rounds
The Original

Fifteen Rounds. Flush.

The Glock® 43X and 48 carry like a single-stack. We wanted 15 rounds in that slim grip without adding length, so we built a steel magazine around a patented staggered geometry. The thin steel walls and the stagger are where the room comes from, and the magazine still sits flush.

The S15 was the first steel-body aftermarket magazine for the 43X and 48. The rest of the industry followed. Gen 3 is the toughest S15 we've built.

15 Rounds, flush in the grip
25 Max with the +10 extension
1st Steel-body aftermarket 43X / 48 mag
USA Made, with Spring for Life
Features

Why It Holds 15

  • Patented Geometry

    A staggered round stack, protected by US patent, fits 15 rounds in a body built for a slim grip.

  • Steel Body

    Thin steel walls leave room for the 15-round stack and stand up to drops and daily carry.

  • Flush Fit

    Sits flush with the bottom of the grip. Nothing hangs below it, so your carry setup doesn't change.

  • Ready to Extend

    An easy-remove, impact-resistant base pad swaps for our +2, +5 or +10 extension in minutes.

One Magazine, Four Sizes

Flush at 15. Extend When You Want More.

Carry the S15 flush, or swap the base pad for an extension: 17 with the +2, 20 with the +5, 25 with the +10.

Want 20 in one piece? See the S20. Capacity laws vary by state and city. Check yours before you buy.

S15Flush   15 S15 +2Extension    17 S15 +5Extension    20 S15 +10Extension    25   S15, flush   Added by extension
Required

Run It With a Steel Mag Catch

The S15 is steel and the catch your 43X/48 shipped with is polymer, and the two aren't compatible. Swap in our Standard or Premium steel catch, both made in the USA. It's a one-time install, and our installation guides walk you through it. Another manufacturer's catch may cause reliability issues.

Standard Catch Premium Catch
Where to Start

Pick Your Setup

New to the S15? Start with a kit that includes the steel mag catch. Already running the catch? The packs below it add magazines and extensions.

Kit S15 Mags Steel Catch Extensions
S15 Magazine (this page) 1 — —
S15 Starter Kit 1 ✓ —
S15 Combo 1 3 ✓ —
S15 Combo Pack 4 3 ✓ 2 × +5
S15 Combo Pack 8 3 ✓ 3 × +5, installed
S15 Combo Pack 9 3 ✓ 3 × +2, installed
S15 Combo Pack 2 3 — 1 × +5
S15 Combo Pack 3 3 — 2 × +5
S15 Combo Pack 7 3 — +5 and +2
S15 Combo Pack 5 5 — —
S15 Combo Pack 6 10 — —

Every catch in these kits is our standard steel catch. Want the Premium? Add it to any pack. See all S-Series combos.

Add a Magwell

S15 Magwell Combos

A magwell flares the bottom of the grip so the magazine finds its way in faster on a reload. Our low-profile Carry Magwell adds that without adding bulk for concealed carry. Each combo pairs it with three S15s and the steel catch, so it's everything you need in one box.

Combo S15 Mags Steel Catch Extensions
S15 Magwell Combo 1 3 ✓ —
S15 Magwell Combo 2 3 ✓ 1 × +5
S15 Magwell Combo 3 3 ✓ 1 × +2

Every Magwell Combo includes a Carry Magwell. Want the widest opening instead? See the Premium Magwell for the 43X / 48.

Gen 3

What's New in Gen 3

  • Tougher Steel

    Thicker, tougher steel in the magazine body for more durability in daily carry.

  • Raised Rear Ribs

    Ribs on the back of the body position the magazine in the grip the way a factory mag sits.

  • Made in the USA

    Gen 3 moved production to US-based manufacturing on new modular tooling, for consistent fit from mag to mag.

  • Three Finishes

    Nitrocarb, Silver Nickel or Black Nickel, all for wear and corrosion resistance.

Specifications

Capacity 15 rounds, 9mm
Compatible pistols Glock® 43X and 48, all generations
Length Flush fit in the Glock® 43X / 48 grip
Body Steel, patented staggered geometry
Finish Nitrocarb (QPQ nitrocarburized), Silver Nickel or Black Nickel (electroless nickel)
Base pad Easy-remove, impact resistant; swaps for S15 +2, +5 or +10 extensions
Mag catch Shield Arms steel catch required (Standard or Premium)
Magwells Works with Shield Arms Carry and Premium magwells for the 43X/48
Made in USA
Warranty Lifetime warranty plus Spring for Life

Three Finishes

Pick yours from the Magazine Finish menu.

Nitrocarb Silver Nickel Black Nickel
Questions

S15 Gen 3 FAQ

Which pistols does the S15 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 polymer catch the pistol ships with isn't compatible with the steel S15. Install a Shield Arms steel mag catch, or start with the Starter Kit, which includes one.

Will my polymer 10-round mags still work?

They'll run with the steel catch, but we don't recommend it for regular use. Steel on polymer adds wear to the magazine over time.

Does it change how the pistol carries?

No. The S15 sits flush with the bottom of the grip, so your grip and holster stay the same.

How do I get more than 15 rounds?

Swap the base pad for an S15 extension: 17 with the +2, 20 with the +5 or 25 with the +10. Prefer one piece? The S20 holds 20.

Nitrocarb, Silver Nickel or Black Nickel?

All three resist wear and corrosion. Nitrocarb is a QPQ nitrocarburized finish; Silver Nickel and Black Nickel are electroless nickel. Choose the look you like.

What changed from Gen 2?

Thicker, tougher steel, raised ribs on the back for factory-like positioning, US-based manufacturing on new tooling, and updated Nitrocarb and nickel finishes.

Does it work in a grip-chopped pistol?

Yes. A 43X or 48 converted by our S10 Grip Chop Service runs the S15. Add a Grip Chop Sleeve to restore full grip length.

What is Spring for Life?

Free replacement magazine springs for as long as you own your S15. See the program.

What's covered?

A lifetime warranty against defects in materials and workmanship, plus Spring for Life.

Related

Built Around the S15

S15 Starter Kit S15 plus a steel catch Premium S15 Mag Catch Steel, made in the USA S15 +5 Extension 20 rounds S20 Magazine 20 rounds, one piece Carry Magwell Glock® 43X / 48 Custom Glock® 43X MOS Built around the S15

See the whole lineup on the S-Series page.

Products specifications
Firearms Manufacturer Glock
Firearms Model Glock 43X/48
Installation Help

Not sure how to install this product? Our step-by-step guides and video walkthroughs make it simple.

View Installation Guides →
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