The Shield Arms Mag Glock 19 +5/4 Extension combines smart engineering with practical design for shooters who want more rounds on tap without changing guns. This 15-round 9mm magazine fits Glock 19 and Glock 23 pistols and ships with the +5 extension already installed—giving you five extra rounds compared to factory capacity. Built from billet 6061 aluminum and finished with Type 2 anodizing, it's durable enough for serious range work, competition, or defensive carry.

What sets this magazine apart is Shield Arms' thoughtful approach to maintenance. The unique floor plate design lets you access the spring and follower quickly without detaching the extension from the magazine body. That means faster cleaning, easier spring replacement, and no fussing with assembly—exactly what you want when you're prepping gear before a match or range day.

Shield Arms backs this magazine with a 100% lifetime warranty and their Spring for Life guarantee, so you can trust it to perform. The included +10% power spring is tuned to handle the extra capacity reliably, giving you confidence that rounds will feed when it counts.

Key Features

• Adds 5 rounds to Glock 19 capacity (15 rounds total)
• Machined billet 6061 aluminum construction with Type 2 anodizing for durability
• Easy-access floor plate design for quick spring and follower service
• Compatible with Glock 19 and Glock 23
• Includes +10% power spring for reliable feeding at extended capacity
• 100% lifetime warranty and Spring for Life guarantee
• Extension pre-installed and ready to use

Specifications

Capacity	15 rounds (9mm)
Compatibility	Glock 19, Glock 23
Material	Billet 6061 aluminum
Finish	Type 2 anodized black
Extension	+5 pre-installed
Included Spring	+10% power spring
Warranty	100% lifetime; Spring for Life guarantee

Frequently Asked Questions

Will this magazine work with my Glock 19?

Yes. The Shield Arms Mag Glock 19 +5/4 Extension is specifically designed for Glock 19 and Glock 23 pistols. The extension comes pre-installed, so it's ready to load and use out of the box.

Can I easily clean or replace the spring?

Absolutely. The floor plate design allows you to access the spring and follower without removing the extension from the magazine body, making maintenance faster and simpler than typical magazine designs.

How many extra rounds does this add?

The +5 extension increases your Glock 19 capacity by five rounds, giving you 15 rounds total compared to the standard 10-round factory magazine.

What spring comes with this magazine?

The Shield Arms Mag Glock 19 +5/4 Extension includes a +10% power spring, tuned to ensure reliable feeding at the extended 15-round capacity.