Glock, OEM Magazine Floor Plate, 9MM, Fits G17, G19 Gen 5 Magazines. The Glock Gen5 Magazine Floor Plate provides a little more meat to get a hold of, should you have to strip a stuck mag from the magwell, plus it makes a nice roost for your little finger for better control during rapid fire. Good news: Glock Gen5 Magazine Floor Plates are compatible with all earlier-Gen Glock magazines, too - all the way back to those for original "Gen1" pistols. If you have a bunch of old mags, you can upgrade them with the new plate. The Glock Gen5 Magazine Floor Plate is manufactured to the same rigorous standards as all Glock factory replacement parts, so it will fit your existing magazines flawlessly.