Agency Mag Ext For G17 17Rd +5 Blk
The Agency Arms magazine extension for Glock 17 gives you five extra rounds per mag—moving from the standard 17-round capacity to 22 rounds. Built in black to match your duty or competition setup, this extension is a straightforward way to pack more ammunition without swapping to a larger-framed pistol. Agency Arms engineered these extensions for reliability under real-world use, whether you're running drills at the range, prepping for a competition, or maximizing your carry capacity for duty or self-defense.
Magazine extensions are popular among competitive shooters, law enforcement, and anyone who runs a Glock 17 and wants the flexibility of higher capacity without changing their platform. The black finish integrates seamlessly with standard Glock mags and modern pistol setups.
Installation and function depend on proper fitment and the quality of your base magazine, so test thoroughly before relying on any extended mag in a critical role. Like any aftermarket part on a carry or duty weapon, make sure your setup is reliable through your own testing.
Key Features
- Adds 5 rounds to standard Glock 17 magazines (17-round capacity becomes 22 rounds)
- Black finish for professional appearance and durability
- Agency Arms quality engineering for reliable performance
- Designed for Glock 17 platform
Frequently Asked Questions
Will this magazine extension fit my Glock 17?
This extension is designed specifically for Glock 17 magazines. Verify your base magazine is a genuine Glock 17 standard 17-round mag before installation.
How much capacity does this add?
The Agency Arms extension adds 5 rounds, bringing your total capacity from 17 to 22 rounds per magazine.
What's the finish?
It comes in black, which matches standard Glock frames and aftermarket upgrades.

