DS20 Combo 1 for Glock 17

Three DS20 20-round steel magazines and the DS-Series steel mag catch they run on, in a Gen 3 or Gen 4/5/6 version. A full Glock 17 setup with three more rounds per mag than factory.
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Availability: In stock
$124.95
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Buy now, pay later Available at checkout on orders over $150
Compatibility

Fits the Glock® 17, 34, 45, 47 and 19X. The Steel Catch Is Included.

The DS20 fits Glock® 17-length grip frames, Gen 3 through Gen 6, and also runs in a Glock® 19 with the base extending below the grip. It's a steel magazine, so the combo includes our DS-Series Standard steel mag catch in place of the factory polymer catch. Choose Gen 3 or Gen 4/5/6 to match your pistol; the Glock® 45, 47 and 19X always take Gen 4/5/6. Carrying a Glock® 19? See the DS18.

Stippled or modified grips: DS-Series magazines may fit tight in a stippled or modified grip. We know of no reliability issues, but in those pistols the magazine may not drop free.

What Is the DS20 Combo 1?

DS20 Combo 1 is a full Glock® 17 magazine setup: three Shield Arms DS20 20-round steel magazines and the DS-Series Standard steel mag catch they run on, in a Gen 3 or Gen 4/5/6 version. Each DS20 holds three more rounds than the 17-round factory magazine with only a minimal increase in overall length, and has an over-insertion stop stamped into the steel body. Three magazines give you 60 rounds. Made in the USA, with a lifetime warranty and Spring for Life.

  • In the combo: (3) DS20 magazines, (1) DS-Series steel mag catch
  • Fits: Glock® 17, 34, 45, 47 and 19X, Gen 3–6
  • Capacity: 20 rounds per magazine, 60 total
  • Catch: Gen 3 or Gen 4/5/6, your choice
Carry + Spares

Twenty in the Gun. Forty More on the Belt.

The DS20 fits 20 rounds of 9mm in a magazine sized for the Glock® 17. Steel walls are thinner than a polymer mag, and that's where the extra three rounds come from.

Combo 1 gives you three identical DS20s, one for the pistol and two for reloads, plus the steel catch they all run on. Swap the catch once and every magazine in the box is ready to go.

3 DS20 magazines
60 Rounds total
+3 Per mag over factory
USA Made, with Spring for Life
In the Combo

A Complete Glock® 17 Mag Setup

  • Three DS20 Mags

    20 rounds each in a steel body, three more than the factory 17, with only a minimal increase in length.

  • DS-Series Steel Catch

    The DS-Series Standard catch in black nitride, Gen 3 or Gen 4/5/6. Ambidextrous, runs the DS20 and DS18. Made in the USA.

  • Stamped Over-Insertion Stop

    Pressed into the steel to set seating depth on every reload. Glock® builds one into its factory mags; most aftermarket mags leave it out.

  • Same Feel Every Reload

    Three identical magazines, so your carry mag and your reloads seat and lock the same way.

DS20 vs. Factory

Three More Rounds in a Glock® 17.

In a Glock® 17, 34, 45, 47 or 19X, the DS20 holds 20 against the factory 17. Glock® 19 owners can run it too, as a 20-round reload that extends below the grip.

Running a Glock® 19 day to day? The DS18 holds 18 in the shorter grip. Capacity laws vary by state and city. Check yours before you buy.

Glock® 17Factory mag   17 DS20In a Glock 17    20 Glock® 19Factory mag   15 DS20In a Glock 19    20   Factory capacity   Added by the DS20
Why a Steel Catch

Steel Mags Run on a Steel Catch

The DS20 is steel and the catch your Glock® shipped with is polymer. We believe the best path to long-term reliability is steel on steel or polymer on polymer, so this combo includes our DS-Series Standard steel catch. Pick Gen 3 for a Gen 3 Glock® 17 or 34, and Gen 4/5/6 for a Gen 4, 5 or 6 pistol or any Glock® 45, 47 or 19X. It's a one-time install, and our installation guides walk you through it.

Install Guide DS-Series Catch
Choose Your Catch

Gen 3 or Gen 4/5/6?

Glock® changed the mag catch between generations, so pick the catch that matches your pistol, not the magazine. Gen 4, Gen 5 and Gen 6 Glocks are marked with their generation on the slide. A Glock® 17, 19 or 34 with no marking is almost always a Gen 3.

Your Pistol Choose This Catch
Glock® 17, 19 or 34, Gen 3 Gen 3
Glock® 17, 19 or 34, Gen 4 / 5 / 6 Gen 4/5/6
Glock® 45, 47 or 19X Gen 4/5/6
Compare

Pick Your Setup

New to the DS20? Start with a kit that includes the steel catch. Already running the catch? Add magazines on their own.

Kit DS20 Mags Steel Catch
DS20 Combo 1 (this page) 3 ✓
DS20 Starter Kit 1 ✓
DS20 Magazine 1 —

Carrying a Glock® 19? DS18 Combo 1 is the same setup with three 18-round DS18s. See all DS-Series combos.

Specifications

In the combo (3) DS20 magazines, (1) DS-Series Standard steel mag catch
Compatible pistols Glock® 17, 34, 45, 47 and 19X, Gen 3 through Gen 6 where the model exists; also runs in a Glock® 19, extending below the grip
Capacity 20 rounds of 9mm per magazine, 60 total (+3 over the 17-round factory magazine)
Length Minimal increase over a factory Glock® 17 magazine
Magazine body Steel, with an over-insertion stop stamped into the body
Mag catch DS-Series Standard steel catch, black nitride, ambidextrous, Gen 3 or Gen 4/5/6; runs DS20 and DS18 magazines; factory polymer mags not recommended
Made in USA
Warranty Lifetime warranty plus Spring for Life on every magazine
Questions

DS20 Combo 1 FAQ

Which pistols does it fit?

The Glock® 17, 34, 45, 47 and 19X, Gen 3 through Gen 6. For the Glock® 43X and 48, see the S-Series. For the Glock® 43, see the Z-Series.

Will the DS20 work in my Glock® 19?

Yes. It runs in a Glock® 19 with the base extending below the grip, so it works as a 20-round reload. For a mag that fits the 19's grip, see the DS18.

Do I need anything else?

No. The combo includes the steel catch all three magazines run on. Choose Gen 3 or Gen 4/5/6 to match your pistol, install the catch and load up.

Which catch do I choose?

Gen 3 for a Gen 3 Glock® 17 or 34. Gen 4/5/6 for a Gen 4, 5 or 6 Glock® 17 or 34, and for any Glock® 45, 47 or 19X, which were never made as Gen 3 pistols. Still unsure? Contact our support team before you order.

How hard is the catch install?

Swapping a Glock® mag catch is a common at-home job with basic tools. Our installation guides walk you through it.

Will it drop free in a stippled grip?

It may not. DS-Series magazines can fit tight in a stippled or modified grip. We know of no reliability issues, but in those pistols the magazine may not drop free when you press the catch.

Will my factory polymer mags still work?

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

Combo 1 or the Starter Kit?

The DS20 Starter Kit is one DS20 and the catch, a way to try it. Combo 1 is three DS20s and the catch, enough for a full setup with spares.

What is an over-insertion stop?

A stop stamped into the steel body that keeps the magazine from seating too deep in the grip, so it locks in at the same depth on every reload.

Are DS20 extensions available?

Not yet. We're engineering extensions built for DS-Series magazines. They'll be sold individually and in DS-Series combos.

What's covered?

A lifetime warranty against defects in materials and workmanship, plus Spring for Life: free replacement springs for as long as you own your magazines.

Related

Build Out Your DS-Series Setup

DS20 Magazine Add another spare DS20 Starter Kit One mag and the catch DS-Series Mag Catch Add one for a second pistol DS18 Magazine 18 rounds for the Glock 19 DS18 Combo 1 Three DS18s and the catch DS-Series Extensions In development

See the whole lineup on the DS-Series page.

Products specifications
Firearms Manufacturer Glock
Firearms Model Glock 17/45 Gen 6, Glock 17/22 Gen 4/5, Glock 17/22 Gen 3
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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