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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.

Shop the SA-9
Grip-chopped Glock 43X with a flush-fit Shield Arms S10 magazine

S10 Grip Chop System

10 Flush. Runs to 20.

See the S10 System →
Shield Arms DS20 magazine for the Glock 17
New

DS-Series · Glock 19 / 17

More Rounds for the Double Stack

Shop DS18 & DS20 →

 Shop by Pistol

Glock 43X / 48 S-Series mags · DUAL‑FIT · Magwells Glock 43 Z-Series mags · Extensions All Glocks DS-Series · Magwells · Extensions S&W M&P 2.0 Mag extensions Springfield Echelon Mag extensions CZ Mag extensions AR-15 Folding lowers · PMAG +5
Now ShippingShield Arms DS20 20-round steel magazine for the Glock 17

 New · DS-Series · Glock 17

20 Rounds in Your Glock 17. Nearly Factory Size.

The DS20 is a steel 20-round magazine for the Glock 17, 34, 45, 47 and 19X: three more than factory, with only a minimal increase in length and an over‑insertion stop stamped into the body.

20 Rounds

+3 Over factory

Gen 3–6 Glock 17 family

Shop the DS20 Magazine See the DS-Series →

Steel body · Lifetime warranty · Spring for Life

Pick Your DS20 Setup

DS20 Magazine 1 DS20 · for pistols already running our steel catch Shop → Start hereDS20 Starter Kit 1 DS20 + steel catch, Gen 3 or Gen 4/5/6 Shop → Full setupDS20 Combo 1 3 DS20s + steel catch, 60 rounds Shop →

Most Popular

Best Sellers

Shop all magazines →
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 at factory length. Runs on the DUAL-FIT catch.

15 Rounds, flush

Shop Now →
Shield Arms S15 Starter Kit with one S15 magazine and a DUAL-FIT steel mag catchKit

S-Series · Glock 43X / 48

S15 Starter Kit

One S15 plus the DUAL-FIT catch it runs on. 10 to 15 rounds, done.

2 Parts, one install

Shop Now →
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; runs on the DUAL-FIT catch.

20 Rounds, one piece

Shop Now →
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.

6 Anodized colors

Shop Now →
NewShield Arms DUAL-FIT steel mag catch for the Glock 43X and 48 in black nitride

 New · DUAL-FIT · Glock 43X / 48

Your S15s and Glock's 15s. One Catch.

The DUAL-FIT is a steel mag catch for the Glock 43X and 48 that runs Shield Arms S-Series mags and Glock's factory 15-round steel mags. Pick right- or left-handed. Black nitride, made in the USA.

2 Mag families, one catch

L / R Right- or left-handed

USA Made

Shop the DUAL-FIT Get It in the Starter Kit →

Steel · Black nitride · Lifetime warranty

Get It in a Kit

Most popularS15 Combo Pack 1 3 S15 mags + DUAL-FIT catch Shop → S15 Combo Pack 4 3 S15 mags + two +5s + DUAL-FIT catch Shop → S15 Magwell Combo 1 3 S15 mags + DUAL-FIT catch + Carry Magwell Shop →

 S10 Grip Chop System · Glock 43X / 48

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, and chopped pistols ship with a DUAL-FIT catch.

See the S10 System Grip Chop Service

Want it done for you? Shop complete S10 pistols →

Shooter aiming an SA-15 folding AR-15 rifle in the field

 SA-15 · SA-9 · Folding Lower

Fold It Without an Adapter.

The folding mechanism lives in the lower receiver itself, so there's no adapter adding bulk or another failure point. Complete SA-15 and SA-9 builds ship to your FFL.

13" SA-9 folded

0 Adapters needed

7075 T6 billet lower

Shop FLR Products Stripped Lower →

Patented design · Lifetime warranty

Shield Arms +5 magazine extensions on Magpul PMAG Gen 3 magazines in ODA Green, Red, Grey, Gold and Black

AR-15 · Magpul PMAG Gen 3

Your 30-Round PMAG. Now 35.

A billet 6061 aluminum baseplate that adds five rounds to any Gen 3 PMAG and keeps the factory spring. Machined in Bigfork, Montana.

35 Rounds

+5 Per magazine

6 Colors

Shop the +5 Extension Pre-Installed on a PMAG →

Gen 3 PMAG only · Lifetime warranty

Grey billet aluminum buckle on a Shield Arms Billet EDC Belt worn beside an inside-the-waistband holster

 Billet EDC Belt · Bigfork, MT

No Holes. No Wearing Out.

The strap's wide teeth lock into a billet aluminum buckle wherever you stop, so it fits the same with a holster on or off. Waterproof strap, trimmed once to your size. Buckle machined in Bigfork, Montana.

0 Holes

1.5" Width

60" Max waist

Shop the Billet EDC Belt Shop Gear →

Original or Glove Latch buckle · Lifetime warranty

 Shop by Category

Popular Categories

All accessories →
Shield Arms magwells for Glock pistolsFaster Reloads Magwells Carry and Premium for Glock, plus the SIG P365. Shop Magwells → Shield Arms pistol magazine extensionsMore Rounds Mag Extensions Glock, S&W, Springfield, SIG and CZ. Shop Extensions → Shield Arms S-Series, Z-Series and DS-Series pistol magazinesS · Z · DS-Series Pistol Magazines Steel magazines for Glock pistols. Shop Magazines → Shield Arms stripped AR-15 lower receiversBuild Your Own Lower Receivers Folding and non-folding AR-15 lowers. Shop Lowers →

In the Field

News From the Shop and the Field

Oct 2026 · Product Launch

The DS18 is shipping: 18 rounds in a Glock 19 magazine that's nearly factory size.

Read the news →

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 →

Spring for Life

Free replacement magazine springs for as long as you own the mag.

Installation Guides

Step-by-step videos for catches, magwells and extensions.

LE / MIL Pricing

Departmental quotes and direct support.

Talk to the Shop

Questions before you order? Reach us in Bigfork.

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.
$39.95
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.
$44.95 $39.95
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.
$39.95
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 a DUAL-FIT black nitride steel mag catch. 45 rounds, all flush. Made in the USA.
$121.95
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.
$74.95
S15 Starter Kit - Nitrocarb

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
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.
$36.95
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.
$39.95
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.
$39.95
Z9 Pistol Magazine for Glock® 43 - PowerCron

Z9 9-Round Steel Magazine for Glock 43

9 rounds of 9mm in a steel magazine for the Glock® 43, the same length as a factory mag with a pinky extension. Takes Z9 +1 and +3 extensions. Requires a Z-Series steel mag catch.
$37.95