Advantage Arms 10-Round 22LR Magazine for Glock 20/21 - Black Finish (AACLE2021)

The Advantage Arms 10-round .22LR magazine for Glock 20/21 is built for shooters who want to stretch their training budget without sacrificing practice time. If you own a G20 or G21 and run an Advantage Arms rimfire conversion kit, this polymer magazine lets you swap calibers and shoot economical .22 Long Rifle ammo downrange while keeping your carry platform familiar. It's a smart move for range days when centerfire ammunition costs add up—train with the same grip, controls, and manual of arms as your duty or carry gun, just at a fraction of the per-round cost.

This magazine holds 10 rounds and features last round hold-open functionality, so you'll get the same shooting cycle and dry-fire practice feedback as full-power loads. The polymer construction keeps weight minimal, and the black finish matches standard Glock aesthetics. Keep in mind: this magazine works only with an Advantage Arms conversion slide kit (sold separately), not with standard G20/21 barrels or slides. If you're already set up with a conversion kit or planning to build one, this is the spare magazine you need to maximize your range sessions.

Made in the USA, the Advantage Arms magazine represents a practical, cost-effective way to get more rounds downrange with the gun you already trust. Whether you're a competitive shooter dialing in drills, a hunter staying sharp between seasons, or someone who just wants affordable practice ammo, a rimfire conversion and spare magazines transform your centerfire platform into a money-saving training tool.

Key Features

• 10-round capacity in .22 Long Rifle
• Polymer construction for lightweight, corrosion-resistant durability
• Last round hold-open for consistent training feedback
• Black finish matches Glock standard aesthetics
• Made in the USA
• Compatible with Advantage Arms Glock 20/21 conversion kits only

Specifications

Frequently Asked Questions

Will this magazine work with my standard Glock 20 or 21?

No. This magazine is designed specifically for use with an Advantage Arms rimfire conversion kit. It will not function with a stock G20 or G21 barrel and slide. You must have the Advantage Arms conversion slide kit installed to use this magazine.

What's the main benefit of training with a .22LR conversion?

The primary advantage is cost savings on ammunition, which lets you shoot more practice rounds downrange while maintaining the same grip, trigger control, and manual of arms as your centerfire carry or duty gun. The last round hold-open feature also provides the same trigger discipline feedback as full-power loads.

Can I use this magazine with other .22 conversion kits?

This magazine is made for Advantage Arms conversion kits specifically. Compatibility with other brand conversion systems is not documented in the product specifications, so we recommend confirming compatibility with Advantage Arms or the other manufacturer before purchase.

Is the conversion kit included?

No. This is the magazine only. The Advantage Arms Conversion Slide Kit is sold separately and is required to use this magazine with your Glock 20 or 21.