This is the Shield Arms magazine extension for the Glock 17/22. This extension adds 3 rounds to Glock 22 magazines and 4 rounds Glock 17 magazines. 

Manufactured from hard-coat adonized aluminum, this extension brings added capacity and durability to your Glock pistol mags. Please note you will need a Glock magazine tool or similar tool to remove the factory Glock baseplate.

If you’re looking for extra capacity for factory Glock 17 magazines, look no further than this Shield Arms magazine extension. Try it yourself – pick up a few today!

Compatible:

• Glock 17 and 22 factory magazines, all Generations
• Can be used in Glock 17, 17L, 19X, 34, 45, 22, 24, and 35 pistols.

Not Compatible:

• Glock 19, 19X, and other Glock pistol magazines.
• 10 round or “blocked” Glock magazines.
• Aftermarket Glock magazines.

Contents Include:

• Shield Arms +4/3 magazine extension
• Replacement spring – maintains same spring tension

Manufactured by Shield Arms in the USA.