The Shield Arms Glock 17/22 Magazine Extension adds 5 rounds to your Glock 17 magazine, and 4 rounds to your Glock 22 magazine. The 19/23 extension adds 5 rounds to your Glock 19 magazine and 4 rounds to your Glock 23 magazine.
The easy access floor plate design allows you to easily access the spring and follower without having to remove the extension from the magazine body.
