Things You'll Need
Instructions
Inspect the Glock pistol to make sure it is unloaded, then remove the clip.
Turn the clip upside down and insert the screwdriver into the hole located near the front of the floor-plate on the bottom of the clip. Press the screwdriver down until you feel the floor-plate release, the floor-plate will slightly slide forward.
Remove the floor plate by sliding it forward, position your thumb over the end of the clip to keep the magazine spring from escaping.
Put the internal mechanism of the clip extension, wide side forward, onto the spring and press down the mechanism is below the lips of the clip.
Slide the extension onto the bottom of the clip in the same manner as the original floor-plate. When the clip extension locks into place, you will hear an audible click.