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Shield Arms SA-9 Gen 2 folding 9mm pistol in profileShooter holding a Shield Arms SA-9 Gen 2 folding 9mm pistol

SA-9 Gen 2 · Folding 9mm AR

13" Folded. Runs Your Glock Mags.

A 7.5" 9mm pistol built on our patented Folding Lower. Folds from 23.5 to 13 inches and takes the Glock double-stack mags you already own.

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Grip-chopped Glock 43X with a flush-fit Shield Arms S10 magazine

S10 Grip Chop System

10 Flush. Runs to 20.

Shield Arms DS20 magazine for the Glock 17
New

DS-Series · Glock 19 / 17

More Rounds for the Double Stack

Shop DS18 & DS20 →

SHOP ACCESSORIES BY MODEL:

Glock 43X / 48 Glock 43 All Glocks S&W M&P 2.0 Springfield Echelon CZ AR-15
Now ShippingShield Arms DS18 18-round steel magazine for the Glock 19

 New · DS-Series · Glock 19

18 Rounds in Your Glock 19. Nearly Factory Size.

The DS18 is a steel 18-round magazine for the Glock 19, three more than factory in nearly the same footprint. An over-insertion stop stamped into the body keeps it seating where a factory mag does.

18 Rounds

+3 Over factory

Gen 3–6 Glock 19

Shop the DS18 Magazine Need the steel catch? Starter Kit →

Steel body · Lifetime warranty

Most Popular

Best Sellers

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Shield Arms S15 Gen 3 15-round steel magazine for Glock 43X and 48Best Seller

S-Series · Glock 43X / 48

S15 Gen 3 Magazine

15 rounds, flush at OEM length. Requires a steel mag catch.

Add to Cart
Shield Arms S15 Starter Kit with one S15 magazine and a steel mag catchKit

S-Series · Glock 43X / 48

S15 Starter Kit

One S15 plus the steel mag catch it needs. 10 to 15 rounds, done.

Add to Cart
Shield Arms S20 20-round steel magazine for Glock 43X and 48

S-Series · Glock 43X / 48

S20 Magazine

20 rounds in one steel body. Extends below the grip; requires a steel mag catch.

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Shield Arms Carry Magwell for Glock 43X and 48 in black

Magwells · Glock 43X / 48

SA Carry Magwell

Low-profile funnel for carry. Drop-in, hardware included.

Add to Cart

Glock 43X / 48 Upgrade

Go From 10 to 15. One Box.

S-Series mags lock up on a steel mag catch, not the factory polymer one. Every kit ships with the catch, so there's nothing else to figure out.

Starter Kit

1 S15 + steel mag catch

Add kit →

Most popular

Combo 1

3 S15 mags + steel mag catch

Add kit →

Add on

SA Carry Magwell 43X / 48

Faster reloads →

S10 Grip Chop System

One Pistol. Five Capacities.

Carry the chopped 43X or 48 at 10 rounds flush. Reload from an S15, an extended mag or an S20 when you want more. Every S-Series mag and extension still fits.

See the S10 System Grip Chop Service Complete Pistols
Shooter aiming an SA-15 folding AR-15 rifle in the field
SA-15 · SA-9 · Stripped Lowers

Fold It Without an Adapter.

The folding mechanism lives in the lower receiver itself. Every adapter-based system adds bulk and a failure point; the patented Shield Arms FLR doesn't. Complete SA-15 and SA-9 builds ship to your FFL.

Patented Design 7075-T6 Billet No Adapter Needed Lifetime Warranty
Shop FLR Products Stripped Lower
Shield Arms magwells for Glock pistols

Faster Reloads

Magwells

Shield Arms pistol magazine extensions

More Rounds

Mag Extensions

Shield Arms S-Series, Z-Series and DS-Series pistol magazines

S · Z · DS-Series

Pistol Magazines

Shield Arms stripped AR-15 lower receivers

Build Your Own

Lower Receivers

Proven on Duty

Chosen by People Who Test for a Living.

May 2026 · Law Enforcement

Lake County Sheriff's Office selects the SA-9 and SA-15 for its Special Response Team.

Read the story →

Press · Concealment Issue 47

The Revolver Optic Conversion puts a red dot on a J-frame with no gunsmithing.

Read the feature →

Bigfork, Montana · Since 2017

Precision Firearms & Accessories from Bigfork, Montana

Shield Arms is a firearms and accessories company founded in 2017 in Bigfork, Montana. Our line includes the patented SA-15 folding lower receiver, steel S-Series, Z-Series and DS-Series magazines for Glock pistols, magwells, and magazine extensions, all backed by a lifetime warranty.

Our Story → LE / MIL Sales → Become a Dealer →

Lifetime Warranty

Every product, for as long as you own it.

Spring for Life

Our magazine spring guarantee. See how it works.

LE / MIL Pricing

Departmental quotes and direct support.

Financing

Pay over time at checkout through Credova.

News
View News Archive
30 Oct 2026 Shield Arms DS18 18-Round Steel Magazine for Glock 19 Now Available, Alongside New DS18 Starter Kit
The Shield Arms DS18 holds 18 rounds in a Glock 19, three more than factory, and is now available on its own or in the new DS18 Starter Kit with the steel mag catch it is designed to run with.
28 May 2026 Lake County Sheriff's Office Selects Shield Arms SA-9 and SA-15 for Special Response Team
Shield Arms announces that the Lake County Sheriff's Office has chosen the SA-9 and SA-15 folding carbines for their Special Response Team following extensive testing.
29 Oct 2025 Shield Arms Revolver Optic Conversion Featured in Concealment Magazine Issue 47
The Shield Arms Revolver Optic Conversion (ROC) is featured in Concealment Magazine Issue 47 by Recoil. Discover how this revolutionary mounting system brings red dot optics to J-frame revolvers without gunsmithing or permanent modifications.
Featured Products
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.
$39.99
Revolver Optic Conversion (R.O.C.) - right side

ROC - Revolver Optic Conversion

Revolutionary mounting system installs red dot sights on Smith & Wesson J-frame revolvers without gunsmithing or permanent modifications. Available in RMRcc and RMSc footprints. Made in USA with lifetime warranty.
$149.99
S20 - 20 Round Glock 43X/48 Magazine

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.
$44.99 $39.99
SA Premium Magwell - Glock 17 Gen 6 - Black

SA Premium Magwell - Glock 17 Gen 6

Professional-grade CNC-machined aluminum magwell engineered for Gen 6 Glock 17 and 45 pistols, featuring an optimized funnel design for championship-level reload speed. Made in USA with a lifetime warranty.
$115.00
Shield Arms carry magwell for Gen 6 Glock 17 with mounting screw and Allen wrench

SA Carry Magwell - Glock 17 Gen 6

The Shield Arms Carry Magwell for Gen 6 Glock 17 and 45 delivers faster, more reliable reloads without the bulk of a competition magwell. CNC-machined from 6061-T6 aluminum, its low-profile funnel design improves magazine insertion speed for everyday carry and duty use. Drop-in installation. Made in USA. Lifetime warranty.
$110.00
Black anodized Gen 6 Glock 19 Carry Magwell

SA Carry Magwell - Glock 19 Gen 6

The Shield Arms Carry Magwell for Gen 6 Glock 19 delivers faster, more reliable reloads without the bulk of a competition magwell. CNC-machined from 6061-T6 aluminum, its low-profile funnel design improves magazine insertion speed while maintaining holster compatibility for everyday carry and duty use. Drop-in installation. Made in USA. Lifetime warranty.
$110.00
Anodized aluminum Gen 6 Glock 19 Premium Magwell

SA Premium Magwell - Glock 19 Gen 6

CNC-machined 6061-T6 aluminum magwell engineered exclusively for the Gen 6 Glock 19. Maximum-opening funnel geometry delivers the fastest, most consistent reloads available for the compact Glock platform—built for USPSA, IPSC, and high-volume tactical training. Drop-in installation. Made in USA. Lifetime warranty.
$115.00
SA-9 FLR 7.5" Folding Pistol - 9mm - Black

SA-9 Gen 2 Folding 9mm AR Pistol, 7.5"

The SA-9 Gen 2 is a folding 9mm AR pistol built on our patented Folding Lower Receiver. It folds from 23.5" to 13" at the receiver with no adapter, runs Glock double-stack 9mm magazines, and locks back on empty. 7.5" threaded barrel, SBA3 brace, billet 7075-T6 lower made in Bigfork, Montana. Ships to your FFL with two 20-round Glock 19 magazines and a sling.
$1,499.99 $1,399.99
SA-15 Stripped Folding Lower Receiver - Black

SA-15 Stripped Folding Lower Receiver

Patented SA-15 Stripped Folding Lower Receiver. No adapter required - revolutionary folding mechanism built into the receiver. 7075-T6 billet aluminum construction. Build your custom folding AR-15 rifle or pistol. Made in USA with lifetime warranty.
$375.00
Bestsellers
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.
$39.99
Standard S15 Mag Catch for Glock® 43X / 48 - Black

Standard S15 Mag Catch for Glock 43X / 48

Essential steel magazine catch for Shield Arms S15 15-round magazines. Prevents wear when using steel magazines, ensures reliable retention and drop-free operation. Ambidextrous design with lower profile ideal for concealed carry. Black nitride finish, easy installation, lifetime warranty. Made in USA.
$12.00
S15 Combo Pack 1 - Nitrocarb

S15 Combo Pack 1 for Glock 43X / 48

A full Glock® 43X / 48 carry setup: three S15 Gen 3 15-round steel magazines and the black nitride steel mag catch they run on. 45 rounds, all flush. Made in the USA.
$122.00 $99.99
Shield Arms Carry Magwell - Glock® 43X/48 - Black

Shield Arms Carry Magwell for Glock 43X / 48

A low-profile magwell for the Glock® 43X and 48: faster, more forgiving reloads with minimal added bulk. CNC-machined 6061-T6 aluminum, drop-in install, made in Bigfork, Montana.
$74.99
S15 Starter Kit - Nitrocarb

S15 Starter Kit

Complete upgrade kit: (1) S15 Gen 3 15-round magazine + (1) Standard steel mag catch. Everything needed to upgrade your Glock 43X/48 from 10 to 15 rounds. Save $10 vs buying separately. Lifetime warranty + Spring for Life guarantee. Made in USA.
$44.99 $39.99
Premium S15 Steel Mag Catch for Glock® 43X / 48 - Nitride

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.
$36.99
Glock® 17/22/34/35/19X/45 +5/4 Mag Extension - Black

Glock 17 +5/4 Magazine Extension (Fits G22, G34, G35, G19X, G45, G47)

Billet aluminum +5/4 magazine extension for factory full-size Glock magazines. Takes a Glock 17 magazine from 17 to 22 rounds, or a .40 S&W magazine from 15 to 19. Fits the Glock 17, 22, 34, 35, 19X, 45 and 47. +10% power spring and Allen wrenches included. Made in USA with a lifetime warranty and Spring for Life.
$39.99
Shield Arms S15 +5 Magazine Extension - Black

Shield Arms S15 +5 Magazine Extension

The Shield Arms S15 +5 Magazine Extension adds 5 rounds to your S15 magazine for a total of 20 rounds. Maximum capacity for competition, home defense, and range use. Lifetime warranty.
$39.99