Glock 19 +5 Pre-Installed 20-Round Magazine

A factory Glock 19 magazine with our billet +5 extension and a +10% power spring pre-installed. Holds 20 rounds of 9mm, three more than a factory Glock 17 magazine. Fits Glock 19 Gen 3–6. Lifetime warranty on the extension, plus Spring for Life.
SKU: G19-ME-5INS
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Availability: In stock
$64.99
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Buy now, pay later Available at checkout on orders over $150
Compatibility

Fits the Glock® 19

This is a complete factory Glock® 19 9mm magazine. It runs in the Glock® 19, Gen 3 through Gen 6. It won't seat in the 19X or 45, which take the longer Glock® 17 magazine; see the Glock® 17 +5 Pre-Installed. Running a Glock® 23 in .40 S&W? The Glock® 19/23 Extension fits your magazines.

What Is the Shield Arms Glock® 19 +5 Pre-Installed Magazine?

It's a factory Glock® 19 magazine with our +5 extension and a +10% power spring already installed, so it holds 20 rounds of 9mm and arrives ready to load. That's three more than a factory Glock® 17 magazine, from your Glock® 19. The extension is machined from billet aluminum in the USA and comes with a lifetime warranty and Spring for Life.

  • Capacity: 20 rounds of 9mm (15 + 5)
  • Fits: Glock® 19, Gen 3–6
  • In the box: factory Glock® 19 magazine, +5 extension installed, +10% power spring
  • Also sold: extension only, for magazines you already own
Glock® 19 +5 Pre-Installed

20 Rounds, Ready to Load

A factory Glock® 19 magazine holds 15. This one holds 20, and it shows up assembled: a genuine Glock® magazine body, our billet +5 extension and a +10% power spring. Nothing to install. Load it and go.

A common setup: carry the flush 15 in the pistol and a 20-round spare on your belt. It's the same extension that's in service with law enforcement agencies around the world.

Features

What You're Getting

  • Genuine Glock® Magazine

    A factory Glock® 19 magazine body, the same one that ships with the pistol.

  • Installed and Sprung

    The +5 extension comes fitted, with a +10% power spring installed to keep all 20 rounds feeding.

  • Easy-Access Floor Plate

    Reach the spring and follower for cleaning or service without taking the extension off the magazine.

  • Index Cuts

    Cuts on the billet 6061 extension give you a better grip when you pull the magazine from a pouch.

Capacity

More Than a Glock® 17 Magazine

Five more rounds than the factory Glock® 19 magazine, and three more than a factory Glock® 17 magazine. Already own magazines? The extension upgrades them to the same 20.

Factory magazine capacity shown for comparison. Capacity laws vary by state and city. Check yours before you buy.

Pair It

Add a Magwell for Faster Reloads

A magwell flares the bottom of the grip so the magazine finds its way in faster. Glock® 19 owners most often pick our low-profile Carry Magwell. For the widest opening, see our Premium Magwells. This magazine also works with most aftermarket flared magwells.

Specifications

Capacity 20 rounds, 9mm (15 + 5)
Compatible pistols Glock® 19, Gen 3 through Gen 6
Doesn't fit Glock® 19X and 45 (they take the Glock® 17 magazine)
Magazine Factory Glock® 19 magazine, 9mm
Extension +5, pre-installed
Spring +10% power spring, installed
Extension material Billet 6061 aluminum, Type II anodized
Floor plate Easy access, no need to remove the extension for cleaning
Grip Index cuts for pulling from a pouch
Magwells Shield Arms Carry and Premium Magwells, and most aftermarket flared magwells
Made in Extension made in the USA
Warranty Lifetime warranty on the extension, plus Spring for Life

A Note on Mud Anodizing

Our Mud anodize shade changed slightly in 2025. Mud items bought before then may not be an exact match to the current shade.

Questions

Glock® 19 +5 Pre-Installed FAQ

Is this a genuine Glock® magazine?

Yes. The magazine body is a factory Glock® 19 magazine. We install our +5 extension and a +10% power spring before it ships.

Will it work in my Glock® 19X or 45?

No. The 19X and 45 take the longer Glock® 17 magazine. See the Glock® 17 +5 Pre-Installed.

Can I run it alongside my 15-round magazines?

Yes. It's a Glock® 19 magazine, so it swaps freely with your factory 15-rounders. Many owners carry the flush 15 and keep a 20 as the spare.

Why the +10% power spring?

Five extra rounds means more spring compression. The heavier spring keeps feeding consistent from the first round to the 20th.

Pre-installed or extension only?

Pre-installed gets you a complete 20-round magazine. Already own Glock® 19 magazines? The extension upgrades them, and it also fits the Glock® 23.

Will it fit my magwell?

It works with our Carry and Premium Magwells and most aftermarket flared magwells.

Do I have to remove the extension to clean it?

No. The easy-access floor plate opens to the spring and follower with the extension still on the magazine.

What's covered?

A lifetime warranty on the extension against defects, plus free replacement springs for life through Spring for Life.

ODA Green

Used on: magazine extensions, magwells

ODA's (Operational Detachment Alpha) are the boots on the ground operational teams of a Special Forces Group. This color began as a special run for a deployed ODA. In continued support we have decided to continue the color as a standard offering and donate a portion of the proceeds to The Green Beret Foundation. Finish is anodized in green.

QPQ Nitrocarburizing Surface Treatment

Used on: magazines, barrels, slides

QPQ Nitrocarburizing is a type of surface treatment used to enhance the durability and corrosion resistance of metal parts. The process involves heating the metal in a controlled environment, where nitrogen and carbon are introduced to the surface of the metal. This forms a thin layer of a hard compound called "nitrides," which increase the surface hardness of the metal.

During the QPQ Nitrocarburizing process, the metal is immersed in a special salt bath and heated to high temperatures. The salt bath contains a mixture of chemicals that release nitrogen and carbon, which penetrate the surface of the metal. The process is carefully controlled to ensure that the nitrogen and carbon penetrate to a specific depth, creating a uniform layer of nitrides on the metal's surface.

The resulting nitride layer provides many benefits to the metal parts, including increased hardness, wear resistance, and corrosion resistance. This treatment helps to increase the lifespan and durability of metal parts, making them more reliable and long-lasting.

Any “scuffing” you see in the surface finish is completely normal, and will not affect the durability or corrosion resistance of the steel.

Electroless Nickel Plating

Used on: magazines

Silver electroless plating offers superior electrical conductivity and corrosion protection with excellent deposit uniformity and adhesion properties. This bright, reflective finish provides outstanding solderability and contact resistance while maintaining the consistent thickness and coverage that electroless plating processes are known for. Black electroless nickel plating provides these same exceptional deposit properties - including lubricity, hardness, and corrosion resistance - but with a fully conductive and uniform black surface finish that combines superior performance with an attractive dark appearance.

This item is controlled for export by the International Traffic in Arms Regulations (ITAR). Please check your state and local laws regarding magazine capacity restrictions.

Freedom Restricted States

If you live in a state that restricts magazine capacity we cannot ship to you unless you are law enforcement or otherwise exempt. If you are exempt from your state's ban please send us a copy of your documentation or official email to [email protected]. Please include your order number.

If you purchase from a ban state and you are NOT exempt, we will cancel your order and charge you a 5% cancellation fee.

Notice

GLOCK® is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H.  Neither Shield Arms nor this site are affiliated in any manner with, or otherwise endorsed by GLOCK, Inc. or GLOCK Ges.m.b.H.  The use of "GLOCK" on this and associated pages on our website is merely to advertise the sale of GLOCK® pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts, visit www.glock.com.

Products specifications
Firearms Manufacturer Glock
Firearms Model Glock 19/23 Gen 3, Glock 19/23 Gen 4/5
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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