I have 3 like new Glock 17 mags (Glock brand) for sale. I have put the finger rest base plates on them which makes for a better grip on the Glock 17 model sub-2000. These extensions have the little hump to fill in the half moon gap on the front of the grip (hump thing can be removed - it just snaps in). I will also include the original base plates. $55 delivered. Discreet PayPal only. Fees included in price. Only for those who can have high cap mags.