Looks and functions well with a few modifications. - Strike Industries Glock 17/ Glock 22 5 Round Extended Magazine Plate

For the people that says this locks all the way at the bottom when loaded to capacity, its not the strike extended mag extension thats the problem. You have to dremel off the sharp part of the follower coz its like an anchor at the bottom of the magazine when filled to 22 rounds. Some glock mags have a groove at the bottom that you have to shave off too. This is just how Glock mags are. It happened to me with other mag extensions too even with extra strong springs. Goodluck!