Glock Magazine Follower 9mm 10rd Mags Orange (G17 Gen5 G19 Gen5 G34 Gen5 MOS). This is a factory original Glock part. This stark orange magazine follower is made to the same high standards in workmanship and materials as you would find in any other Glock part or firearm. This follower is designed for 10 round magazines and is a great replacement for a worn or damaged part; or have this as a spare to keep your Glock in top operating form.